Integrotech sp. z o.o. Plac Zwycięstwa 2 bud. D lok Łódź, Poland

Transcription

1 MSP-MK1.x is a group of communication modules which consists of: a metrology communication module MSP-MK1.0 (basic), a 4-port Fast Ethernet switch MSP-MK1.1 and a 3-port Fast Ethernet switch with fibre-optic port MSP-MK1.2 (opto). MSP-MK1.0 consists of: a GPRS modem, Fast Ethernet port, RS-485 port, three ports RS-232/422/485 (software configurable mode), six voltage and digital inputs, one connector outputs and bus port to which one of the remaining devices can be connected: MSP-MK1.1 or MSP-MK1.2. MSP-MK1.0 offers conversion of the media with GPRS and Ethernet on RS-232/422/485 with multiple access the same communication port may be read simultaneously and independently from two networks. The device is supplied with software for monitoring and configuration. This manual contains a description of the device and the configuration software. Integrotech sp. z o.o. Plac Zwycięstwa 2 bud. D lok Łódź, Poland

2 IO/MSP-MK/EN/r1-2 / 17 - Integrotech sp. z o.o. Document title User manual for MSP-MK1.x communication modules Version IO/MSP-MK/EN/r1 Issue date History of amendments r First version of the document. Describes the Configurator software, options for connecting devices and a description of acoustic diagnostics at start-up. This document includes an alphabetical index. Integrotech sp. z o.o. Plac Zwycięstwa 2 bud. D lok Łódź, Poland tel.: fax: office@integrotech.com.pl Document version: IO/MSP-MK/EN/r1

3 Integrotech sp. z o.o. - 3 / 17 - IO/MSP-MK/EN/r1 Contents List of illustrations... 4 List of tables Introduction MSP Modular Measurement System MSP-MK communication modules (MK) in the MSP family MSP-MK1.0 multifunction communications and measurement module MSP-MK1.1 Fast Ethernet switch MSP-MK1.2 (opto) Fast Ethernet switch with fibre-optic port Basic Specifications Operating conditions Common features of the MSP-MK group of units Physical properties Working conditions MSP-MK1.0 (basic) and MSP-MK1.0i Voltage digital inputs Connector (relay) output Communication ports GPRS modem Ethernet Description of outputs MSP-MK1.1 (switch) Description of outputs MSP-MK1.2 (opto) Description of outputs Preparing for operation Installation Start-up procedure Servicing mode Initialising communication Initialising LAN Initialising GPRS Acoustic diagnostics during the start-up procedure Description of the Configurator software Wersja dokumentu: IO/MSP-MK/EN/r

4 IO/MSP-MK/EN/r1-4 / 17 - Integrotech sp. z o.o. 4.1 Connection with the device Maximum time of communication failure Modem settings LAN network settings Routing TCP ports to COM communication ports Settings for COM ports Routing between communication ports (MSP-MK1.0i only) Optimising multiple access Multiplying connections to the target device Maximising the communication speed Adjusting permissible response timeouts Alphabetical Index List of illustrations Figure 1. Distribution of the MSP-MK1.0. module s outputs... 8 Figure 2. MSP-MK1.0 name plate... 9 Figure 3 Front view of the MSP-MK1.0 module... 9 Figure 4. Main window of the Configurator application Figure 5. Communication medium selection window Figure 6. Setting the time of the automatic reset Figure 7. GPRS settings Figure 8. LAN settings Figure 9. GPRS interface s TCP port settings Figure 10. LAN interface s TCP port settings List of tables Table 1. Review of MSP-MK communication modules... 5 Table 2. Distribution of MSP-MK1.0. module s outputs... 8 Table 3. Distribution of MSP-MK1.1 module s outputs... 9 Table 4. Distribution of MSP-MK1.2 module s outputs Table 5. COM4 port s settings in the servicing mode Table 6. Acoustic diagnostics for the MSP-MK1.0 device Document version: IO/MSP-MK/EN/r1

5 Integrotech sp. z o.o. - 5 / 17 - IO/MSP-MK/EN/r1 1 Introduction Thank you for choosing a device from the Integrotech family of MSP (Modular Measurement System) products. Its design and functions are the result of our many years of experience in the field of measurement, communication and automation of processes in the demanding gas appliances market. We welcome any comments concerning satisfaction with your choice, as well as those suggesting further development of the purchased device. 1.1 MSP Modular Measurement System Modular Measurement System is the name of a family of products whose primary purpose is measurement of gaseous fuels, which can operate as independent units or as a set of measuring devices with varying degrees of complexity of architecture. The MSP family includes, among others: MSP-02-FC Flow Computer, (MSP-01WW.2A, MSP-01WW.6D analogue and pulse separators (MSP-01WW.2A, MSP-01WW.6D) analogue and pulse separators and mixed analogue-pulse separators in a spark-free implementation (MSP-SEP01.AA, SEP01.DD SME, SME-SEP01.AD) analogue output modules (MSP-01WY.2A, MSP-01WY.4A) MSP-nCOM and MSP-MK1.x. communication modules 1.2 MSP-MK communication modules (MK) in the MSP family The MSP-MK1.x series of communication modules is a group of sophisticated measuring and communication devices, each of which can operate separately, but can also be easily combined by means of the connector on the housing base. The most advanced and expanded representative of this group is the MSP-MK1.0 module, whose communication options can be further expanded by adding one of the other devices - MSP-MK1.1 (switch) or MSP-MK1.2 (opto). Catalogue name Alias Features Possible operating modes GPRS Modem 1 Fast Ethernet Port (RJ45) as an independent device MSP-MK1.0 BASIC 1 RS-485 Port with attached module 3 RS-232/422/485 ports o MSP-MK1.1 6 voltage-digital inputs 1 connector (relay) output o MSP-MK1.2 MSP-MK1.1 SWITCH 4 Fast Ethernet ports (RJ45) as an independent device attached to the device o MSP-MK1.0 MSP-MK1.2 OPTO as an independent device 3 Fast Ethernet ports (RJ45) attached to the device 1 fibre optic port (SC or ST) o MSP-MK1.0 Table 1. Review of MSP-MK communication modules MSP-MK1.0 multifunction communications and measurement module The MSP-MK1.0 communication module is an intelligent communication and measurement device. This unit features: a four-band GSM (GPRS) modem one Fast Ethernet port in the form of an RJ-45 socket Wersja dokumentu: IO/MSP-MK/EN/r

6 IO/MSP-MK/EN/r1-6 / 17 - Integrotech sp. z o.o. three RS-232/422/485 ports (the operating mode of these ports configured by the software) one RS-485 port, six voltage-digital inputs (each digital input has the ability to switch to 0-30V voltage input operating mode) one low power connector (relay) output The device can be treated as: a media converter (serial ports server): o GPRS -> RS-232/422/485 o Ethernet -> RS-232/422/485 a multiplexer: o GPRS+Ethernet -> RS-232/422/485 access from many different networks can be obtained to one communication port simultaneously a six-port telemetric input module, available via LAN or WAN (GPRS), equipped with: o six signal inputs, or o six voltage inputs or o any combination of signal and voltage inputs, giving a total of six inputs; a control module (relay output), available via LAN or WAN (GPRS) network or as any combination of the above, within the available inputs, outputs, and communications ports. One can connect to this device a MSP-MK1.1 type 4-port Ethernet switch or an MSP-MK1.2 switch with three RJ-45 ports and one fibre-optic port, additionally increasing the number of and expanding the range of available connection types and media conversions to include the following : a media converter (serial ports server): o Ethernet (fibre-optic) -> RS-232/422/485 a multiplexer: o GPRS + Ethernet + fibre-optic -> RS-232/422/485 access from many different networks can be obtained to one communication port simultaneously by means of three different media Note 1. Connecting and disconnecting MSP-MK1.x devices must be carried out with the power disconnected. Note 2. With the MSP-MK1.1 (switch) or MSP-MK1.2 (opto) module connected, the Ethernet port of the MSP-MK1.0 device is inactive (offline) MSP-MK1.1 Fast Ethernet switch The MSP-MK1.1 module is a 4-port Ethernet switch, which can work as an independent unit, or attached via a dedicated connector in the housing to the MSP-MK1.0 module MSP-MK1.2 (opto) Fast Ethernet switch with fibre-optic port The MSP-MK1.1 module is a 3-port Ethernet switch, additionally equipped with one fibre-optic port (SC or ST), which may work as an independent unit, or attached via a dedicated connector in the housing to the MSP-MK1.0 module Document version: IO/MSP-MK/EN/r1

7 Integrotech sp. z o.o. - 7 / 17 - IO/MSP-MK/EN/r1 2 Basic Specifications 2.1 Operating conditions The units can be installed in rooms free of explosive gases and vapours and protected from access by individuals untrained in the operation of the device. 2.2 Common features of the MSP-MK group of units Physical properties Dimensions Installation mm 35 mm DIN rail Working conditions Ambient temperature C Degree of protection IP20 Power supply 6 35 VDC 2.3 MSP-MK1.0 (basic) and MSP-MK1.0i Power consumption 3.6 W Power supply Maximum power With a power supply of consumption 600 ma 6 V 300 ma 12 V 150 ma 24 V 120 ma 30 V 105 ma 35 V Weight < 205 g (without antenna) Voltage digital inputs Number of inputs 6 Range of input voltages 0-30 V Connector (relay) output Maximum power 2 A Maximum voltage 30 V Communication ports Baud rates [bit/s] 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, RS-232/422/485 3 units, operating mode set by the software RS unit GPRS modem Frequency range 850 / 900 / 1800 / 1900 MHz Power consumption class 4 MHz), 1 MHz) GSM standards handled Phase 2/2+ Characteristics GPRS multi-slot class 10/8, GPRS mobile station class B Ethernet Ethernet Auto-negotiation Auto-MDI/X 1 Fast Ethernet 10/100 Mbps port Yes Yes Wersja dokumentu: IO/MSP-MK/EN/r

8 IO/MSP-MK/EN/r1-8 / 17 - Integrotech sp. z o.o Description of outputs Power, communication and signalling circuits are not galvanically isolated (they have a common ground). The operating mode of the COM1-COM3 communication ports can be selected by means of the software the communication connection method is quoted for each of the options designated RS-232/RS-422/RS-485 (the COM4 port always operates in the RS-485 mode). Power supply Voltage-digital inputs Connector output +V CC GND S1 S2 S3 S4 S5 S6 RL 23 1,2,18,20,24 26,28,30,32 Communication ports COM1 COM2 COM3 COM4 Rx Tx Rx Tx Rx Tx RS-232 R- R+ T- T+ R- R+ T- T+ R- R+ T- T+ RS-422 B A B A B A B A RS Table 2. Distribution of MSP-MK1.0. module s outputs Figure 1. Distribution of the MSP-MK1.0. module s outputs Document version: IO/MSP-MK/EN/r1

9 Integrotech sp. z o.o. - 9 / 17 - IO/MSP-MK/EN/r1 Figure 2. MSP-MK1.0 name plate Figure 3 Front view of the MSP-MK1.0 module 2.4 MSP-MK1.1 (switch) Ethernet 4 Fast Ethernet 10/100 Mbps ports Connections 4 RJ45 sockets on the front wall Auto-negotiation YES Auto-MDI/X YES Weight < 250 g Power consumption 2.4 W Power supply Maximum power Power supply consumption 400 ma 200 ma 100 ma 80 ma 70 ma Description of outputs Table 3 presents the distribution of outputs of the MSP-MK1.1 switch. Power supply NC +V CC GND , 30 Table 3. Distribution of MSP-MK1.1 module s outputs. Wersja dokumentu: IO/MSP-MK/EN/r

10 IO/MSP-MK/EN/r1-10 / 17 - Integrotech sp. z o.o. 2.5 MSP-MK1.2 (opto) Ethernet 4 Fast Ethernet 10/100 Mbps ports Connections 3 RJ45 sockets on the front wall 1 (SC or ST type) fibre-optic connection on the front wall Auto-negotiation YES Auto-MDI/X YES Weight < 250 g Power consumption 4 W Power supply Maximum power Power supply consumption 670 ma 340 ma 170 ma 135 ma 120 ma Description of outputs Table 4 presents the distribution of outputs of the MSP-MK1.2 switch. Power supply NC +V CC GND , 30 Table 4. Distribution of MSP-MK1.2 module s outputs. 3 Preparing for operation 3.1 Installation Before installing the modem, you need to first insert the SIM card in the opening on the base of the unit. Using the six-element DIP-SWITCH, select the operation mode for the voltage-digital inputs. In the ON, position, the appropriate input operates in the digital input mode, and in the OFF position operates as a 0-30 V voltage input. MSP-MK modules are to be mounted on a 35 mm DIN bus and connected to each other before connecting the mains power supply. Table 1. describes acceptable connection alternatives. The mutual orientation of the devices (order of mounting on the DIN bus) does not matter. Note: Where two devices are connected as one unit, the power supply should be connected only to the MSP-MK1.0 or MSP-MK1.0i module. 3.2 Start-up procedure The following procedure must be followed each time the device is powered up or reset Servicing mode Directly after powering up or resetting the device, it remains in the servicing mode for 15 seconds. During this time - if necessary one may connect the Configurator software to it via (exclusively) the COM4 port. It should be remembered that COM4 is an RS-485 port. The connection parameters in servicing mode are shown in Table 5 (there is no need to enter these as the factory installed software is supplied with these settings). During this time, one cannot communicate with the unit by any other communication channel Document version: IO/MSP-MK/EN/r1

11 Integrotech sp. z o.o / 17 - IO/MSP-MK/EN/r1 Parameter Value In the servicing mode Baud rate Number of data bits 8 Number of stop bits 1 Parity control none Table 5. COM4 port s settings in the servicing mode Readiness to communicate in the servicing mode is signalled by a blinking S1-S6, SYS and LAN diode with a frequency of about 1 Hz. After making the connection and for instance reading the configuration, the frequency of the blinking LED diodes is increased to 10 Hz. The device remains in this mode until: the user resets the device by pressing the appropriate button in the Configurator software, or communication on COM4 port is lost for 20 minutes 20 minutes after the last configuration read or write command, the device resets itself. This means that in servicing mode, each configuration read or write command sets back the device s automatic reset by 20 minutes. For the new settings to apply, one must reset the device using the Configurator software (see Chapter 4) or by cutting off the power supply. When not in servicing mode, i.e. under the device s normal operating conditions, configuration of the device is only possible when connecting via LAN or GPRS. Only in the servicing mode with the MSP- MK1.0 unit can one communicate via a serial port - and only via COM Initialising communication After leaving the servicing mode, the device performs diagnostics of the LAN and GPRS connection, signalling any problems found acoustically. Each tone is repeated three times, enabling it to be clearly identified. In the event of communication problems, the whole procedure is repeated three times, which is why entering a wrong PIN will block the SIM card following the start-up procedure (there will be three successive attempts to unlock the SIM card using the wrong PIN). In such cases one must unlock the SIM card, for example by using a compatible mobile phone Initialising LAN In this step of the start-up procedure the device checks whether any of the auxiliary modules (MSP- MK1.1 switch or MSP-MK1.2 opto) have been connected to the internal bus. If an auxiliary module is detected, this is followed by disconnection of the LAN port (RJ-45) on the front of the MSP-MK1.0 unit (connection to the switch is effected using a Fast Ethernet link, set up in the internal bus). If nothing is connected to the LAN port, an appropriate audible signal is generated (see Table 6) Initialising GPRS The device then connects to the GSM network and any errors are signalled by audible notifications, as shown in Table 6 on page 12 (below). If this fails, the procedure is repeated three times, which is why entering the wrong PIN causes three attempts to open the SIM card with the wrong code, which will lead to it being blocked. The SIM card can be unlocked, for example by using a compatible mobile phone and entering PUK. The procedure for unlocking the SIM card is beyond the scope of this document. Wersja dokumentu: IO/MSP-MK/EN/r

12 IO/MSP-MK/EN/r1-12 / 17 - Integrotech sp. z o.o. 3.3 Acoustic diagnostics during the start-up procedure Table 6 lists all audible notifications that may occur, along with the basic troubleshooting procedure. One should read this list before attempting to connect the unit. Problem Number of acoustic signals Lack of communication on both communication channels No communication for a specified period - the device will reset itself Problems with the LAN connection Ethernet cable disconnected 6 14 Problems with the GPRS modem The modem does not 4 respond Remedy This problem occurs whenever during the time specified by the user (a maximum 255 minutes) there is no communication on either channel (LAN and GPRS). The solution is one of the following: increase the time allowed for lack of communication (up to 255 minutes) force periodic communication via LAN or GPRS for a period less than the specified time without communication if the device is to be only occasionally queried this can safely be ignored The solution is one of the following: connect network cable to the LAN port Connect the MSP-MK1.1 or MSP-MK1.2 module ignore if the LAN port is not going to be used Contact your service provider. This may also mean Invalid PIN (follow procedure below) Invalid PIN 8 Entering an incorrect PIN locks the SIM card! Disconnect the power supply, remove the SIM card and unlock it using PUK in another device (e.g. mobile phone). Then set a PIN and enter it in the device using the Configurator software. 1. Check the antenna connection. GPRS connection 2. Check GPRS network coverage at installation site. 10 problem 3. Use an antenna with a higher gain (e.g. external or directional antenna) 1. Insert the SIM card. No SIM card Clean the contacts of the SIM card. 3. Change the SIM card. No PPP connection Wait a few seconds and try again Problem negocjacji PPP If the problem persists, contact your service provider Table 6. Acoustic diagnostics for the MSP-MK1.0 device It should be remembered that each of the signals is repeated three times in order to avoid confusion Document version: IO/MSP-MK/EN/r1

13 Integrotech sp. z o.o / 17 - IO/MSP-MK/EN/r1 4 Description of the Configurator software The MSP-MK1.0 Configurator software is used to set the following aspects of the device s operation: 1. maximum time without communication 2. GPRS network parameters (APN, user name log in, password, PIN) 3. LAN network parameters (IPv4 address, subnet mask, gateway, and device s MAC address) 4. operating modes of COM1-COM3 ports (RS-232/422/485) 5. the communication parameters of the COM1-COM4 ports (speed, parity, number of data bits and stop bits) 6. TCP ports on which LAN and GPRS interfaces are listening and where routing to communication channels takes place (COM1-COM4). Figure 4 presents the appearance of the Configurator software window: Figure 4. Main window of the Configurator application 4.1 Connection with the device To connect to the device in order to configure it, select the communication medium, and then click on "Connect". During normal operation, the device may only be accessed via the LAN or WAN (GPRS) port. In the servicing mode the device may only be accessed via the COM4 (RS-485) communications port. Wersja dokumentu: IO/MSP-MK/EN/r

14 IO/MSP-MK/EN/r1-14 / 17 - Integrotech sp. z o.o. To select a communication medium, close the connection button (if this is open) and then click on the button to open the window for selecting a communication medium. In this window, you can choose a connection via a serial port - if this option is selected, from the list next to it one must select to which port of the PC the device s COM4 is connected - this option only works in the servicing mode. Another option, intended for normal operation is TCP connection to port In the IP Address field, enter one of the two IP addresses that have been assigned to the device s interfaces - or the address set as the LAN address, or the address assigned by the GPRS network, in accordance with the agreement with the network operator. Figure 5 presents the appearance of the window for selection of the communication medium. Figure 5. Communication medium selection window It should be remembered that any configuration action should begin by reading the device s settings by means of the Read button on the toolbar. After making changes, these should be entered in the device using the Save button. For the changes to take effect, reset the unit (using the Reset button or by cutting off the power supply. 4.2 Maximum time of communication failure In the WatchDog section, one should specify the time (in minutes) after which the device will be reset, if there should be no communication on any of the (GPRS or LAN) ports. In the text field one can enter any integer value from 1-255, which corresponds to the time from 1 minute to 4 hours and 15 minutes. WatchDog enables one to re-establish connection to the device, which for any reason ceases to communicate. After counting off the specified number of minutes, in the absence of any communication, the device will emit six beeps three times (see Table 6. ) and reset itself. Figure 6. Setting the time of the automatic reset Document version: IO/MSP-MK/EN/r1

15 Integrotech sp. z o.o / 17 - IO/MSP-MK/EN/r1 This time is based on normal operating conditions; it should be remembered that in the servicing mode, the device will always reset itself after 20 minutes of no communication. 4.3 Modem settings In this section (see Figure 7), one should quote the GPRS parameters for the GSM network: APN (Access Point Name), user name log in and password for access to the network. These values are specified for a given GSM network and provided by your service provider (network operator). In the last field in this section, enter the SIM card s PIN. Note: entering a wrong PIN and turning on the power will block the SIM card! After connecting to the Internet, the device will be assigned an IP address by the network operator. To ensure uninterrupted communication, this address should be constant, i.e., it should not change after resetting of the device. Ensured stability of the IP address is a provision of the contract with the GSM network operator. Figure 7. GPRS settings Figure 8. LAN settings 4.4 LAN network settings In this section (see Figure 8) one must quote the IPv4 protocol parameters for the LAN interface the IP address, subnet mask, and default gateway address. Optionally, one may also change the address of the second layer (MAC). 4.5 Routing TCP ports to COM communication ports In the sections marked GPRS TCP-X port and TCP LAN-X port, where X is the letter A, B, C or D, assignment of a specific TCP port of a given interface to a specified communications port is configured. Any number of TCP ports from each network can be assigned to any communication port (COM1-COM4). Figure 9. GPRS interface s TCP port settings Figure 10. LAN interface s TCP port settings This means that devices connected to a particular communications port may be simultaneously accessible for up to eight clients - controllers, systems, operators etc. In extreme cases a single device may be queried at the same time by eight independent clients (for versions of the MSP-MK1.0 device, subject to the reservations discussed in Chapter 6). Wersja dokumentu: IO/MSP-MK/EN/r

16 IO/MSP-MK/EN/r1-16 / 17 - Integrotech sp. z o.o. 4.6 Settings for COM ports In the group designated COM1-COM4, one may set operating parameters for a given communication port, such as: bitrate (4800, 9600, 19200, 38400, and bits per second) number of data bits (5, 6, 7 or 8), parity control (even, mark, none, odd, or space), number of stop bits (1, 1.5 or 2). In addition, for ports COM1-COM3 one may select the port s operating mode (RS-232/422/485). The COM4 port always operates in the RS-485 mode. 5 Routing between communication ports (MSP-MK1.0i only) In the MSP-MK1.0i version of the device COM3 cannot be used by the ports server and the TCP ports LAN-C and GPRS-C are also not available. All traffic from COM3 is routed to COM4. Routing between ports COM3 and COM4 is permanent and cannot be in any way modified by the user. In addition to the above, the operation of COM4 is the same as in the basic version (MSP-MK1.0) it is available as a routing destination for both LAN and GPRS TCP ports, and also its functions in the servicing mode are the same. Given the above, it should be noted that up to seven clients may use the MSP-MK1.0i device simultaneously (three clients on LAN ports, three on GPRS ports and one on the COM3 port). 6 Optimising multiple access Thanks to the use of intelligent query processing algorithms, the MSP-MK1.0 and MSP-MK1.0i units provide a good approximation of true simultaneous operation. It should be noted however, that communication of many clients with a target device using a single serial link is not and cannot be implemented at the same time. This is due to the nature of these connections, dedicated to the implementation of arrangements in a point-to-point topology (such as RS-232) or a bus topology with a single master unit and many slave units such as RS-485. Emulating simultaneity is possible thanks to among other things buffering and queuing of queries and responses. Both buffering and queuing add a slight (though non-zero) time overhead to all operations. Which is why in designing a solution where many clients connect via a single serial communication channel with one device, one must expect delays in communication that will occur in connection with the need to wait for the processing of queries originating from other clients to be completed. When planning a system of the following type: many clients MSP-MK1.0 target device, one should seek to minimize the waiting time for a response by eliminating all potential sources of time overheads in the communication process so that these do not exceed the response timeout permitted by the master unit. The following sections discuss recommended strategies for this purpose Document version: IO/MSP-MK/EN/r1

17 Integrotech sp. z o.o / 17 - IO/MSP-MK/EN/r1 6.1 Multiplying connections to the target device First of all, one must make sure to use the maximum number of available communication channels between the target device and the MSP-MK1.0. The use of many channels shortens the queries queue, and consequently, the waiting time for a response over a given channel. It also allows for prioritising of clients - for example, the reserving of a dedicated channel for a critical client. An additional advantage gained from multiplication of communication channels is of course increased traffic assurance and the minimising of the effects of potential breakdowns. Whenever possible, one should use the maximum available number of ports. 6.2 Maximising the communication speed Another important factor is selection of the maximum possible communication speed of the target device with the MSP-MK1.0 unit. As a result, the time for transmission of queries and responses will be reduced to a minimum. The speed of communication should each time be adapted to the length of the line connecting the target device to the MSP-MK1.0 unit and should take into consideration the occurrence of other factors that may adversely affect the quality of the connection. The manufacturer recommends confirming proper communication by simulating work under field conditions before handing over the installation. 6.3 Adjusting permissible response timeouts Having taken care of the above, one may also increase the waiting times for responses by master units. Waiting times should be chosen experimentally, confirming correct selection by means of appropriately comprehensive tests. Alphabetical Index COM1-COM3 operating mode selection Modular Measurement System review of devices... 5 MSP-MK1.0 functions... 6 extended... 6 interfaces number of data bits number of stop bits parity control RS RS RS Wersja dokumentu: IO/MSP-MK/EN/r