Amazing Electronic (HK) Limited Serial RS232/RS485 to analog signal converter

Transcription

1 DAM-DA D/A converter Datasheet Overview: DAM module is a new generation data acquisition and control system based on modular embedded systems. Adopting standard DIN35 rail mounting package is simple, flexible respond to various field applications. They establish networks through RS485, RS232, Ethernet and other means of communication. DAM-DAis the analog input series module can simultaneously capture two differential or single-ended signal. The acquisition accuracy is 12 bit. Widely used to collecting various voltage and current signals on industrial site. Such as signals from a variety of sensors, transmitters, thermocouple can be gathered through it. DAM-DA is with galvanic isolation technology and watchdog technology, effectively guaranteeing safe and reliable equipment operation. Product Features: embedded real-time operating system Out signal range: ± 20mA, ± 10V, ± 5V Products Application: Remote monitoring and data acquisition Intelligent Building Control ± 2.5V, ± 1V, ± 200mV, ± 100mV, ± 50mV Security Products and Security Project Out Channels: 2 single-ended DA converter resolution: 12 Bit Measuring Accuracy: ± 0.2% (typical) Sampling rate: 20 times / sec (all channels) Wide range power supply: 8-32V DC Address / Baud rate / range configurable by the user Industrial control on site Warehousing and monitoring Medical, industrial product development Food and beverage industry Packaging and Material Transfer Electronics Manufacturing Supports MODBUS RTU protocol Smart home system ± 15KV ESD protection Isolation voltage: 3000V DC Operating temperature range: Industrial grade plastic shell, the standard DIN35 rail mounting info@amazingelectronic.com Page 1 of 15

2 Model Series: DAM-DA Model NO.: DAM-DA DAM-802x DAM-804x DAM-808x DAM-902x DAM-904x DAM-908x Function type Serial RS232/485 to analog signal General 2 channel analog input General 4 channel analog input General 8 channel analog input Multi-range 2 channel analog input Multi-range 4 channel analog input Multi-range 8 channel analog input Summarize: DAM-DA products achieve the host RS-485/232 interface signals isolation to standard analog signal, to control the remote device. DAM-DA products can be applied to RS-232/RS-485 bus industrial automation control systems,4-20ma,0-5v,0-10v and other standard signal output, used to control the implementation of industrial field devices, control devices and display devices, etc. and so on. Products include power supply isolation, signal isolation, linearization, D / A conversion and RS-485 serial communication. Each serial port of the maximum 256 DAM-DA series of modules, means of communication using ASCII code or MODBUS RTU communication protocol communication protocol, its instruction set compatible with the ADAM modules, the baud rate is set by the code, with other manufacturers control module hanging in the same RS-485 bus, to facilitate computer programming. DAM-DA series of products are based on single chip of intelligent monitoring and control systems, all the user to set the calibration value, address, baud rate, data format, checksum status and other configuration information is stored in nonvolatile memory EEPROM inside. DAM-DA series of products according to industry standard design, manufacture, signal output / communication interface isolation, can withstand 3000VDC isolation voltage, anti-interference ability, and high reliability. Operating temperature range: - 45 ~ +80. Figure1 DAM-DA figure image info@amazingelectronic.com Page 2 of 15

3 DAM-DA Function Introduction: DAM-DA signal isolated D/A converter module can output one channel voltage/current signals, or 2-channel common ground and isolation current/voltage signals. 1. Analog signal output: 12-bit accuracy, have been calibrated all signal input before ex-factor. Also, Users can program himself; two output signals must be same when testing two signals. 2. Communication software: Communication Interface: 1 standard RS-485 interface or 1 standard RS-232 interface Communication agreement: Standard ASCII, MODBUS RTU, can make network communicate with PLC,RTU or watch software. Data format: 10-bit, 1 start bit, 8 data bits, 1 stop bit. Communication address (0~255) and baud rate ( bps),Max. Communication distance: 1200m, connect by both twists shield cable.±15kv ESD protection, communication response time is less than 100mS. Anti-jamming: Set checksum according to need. Its inside contains MOMENTARY bate diode, can restrain surge impulse, protect modules. Model Selection: DAM-DA - Communication port: O Output voltage or current value 485: input is RS-485 interface 232: input is RS-232 interface U1:0-5V U2:0-10V U3:0-75mV U4:0-2.5V U5:0-±5V U6:0-±10V U7:0-±100mV U8:User-define A1:0-1mA A2:0-10mA A3:0-20mA A4:4-20mA A5:0-±1mA A6:0-±10mA A7:0-±20mA A8:User-define Example: 1: Model:DAM D/A -485-A4 represents RS-485 interface input,4-20ma output 2: Model:DAM D/A -232-U1 represents RS-232 interface input,0-5v output info@amazingelectronic.com Page 3 of 15

4 DAM-DA General Parameters: +25,Vs is 24VDC) Outputs: Voltage / Current Accuracy: 0.2% Output Maladjustment: current output ±0.5 ua/, voltage output ±0.1mV/C Temperature Drift: ±20 ppm/ (±30 ppm/,max) Output Resistance: current output: 350Ω (4-20mA/0-20mA/0-±20mA output) Voltage output: 10mA (0-5V/0-10V/0-±5V output) Communications Protocol RS-485 or RS232 ASCII format, MODBUS Baud Rates Software Selectable ( bps) Address (0~255) Software Selectable Response Time: 100 ms, max Operation Power Supply: +8~32VDC (inner protection circuit of overvoltage and reverse) Power Loss: <1.5W Operation Temperature: - 45 ~ +80 Operation Humidity: 10 ~ 95% (non-condensing) Storage Temperature: - 45 ~ +80 Storage Humidity: 10 ~ 95% (non-condensing) Isolation Input/Output: 3KVDC,1 minute, leak current:1ma Interface and power supply are common-ground. Endure Impact Voltage: 3KVAC, 1.2/50us (peak value) Mechanical Dimensions: mm x 79 mm x 25 mm Footprint Definition: Pin Name Definition Pin Name Definition 1 PW+ Power + 7 Out0+ Analog output 0 out+ 2 GND Power- 8 GND1 Analog output 0 out- 3 INIT Initial State 9 NC NC 4 D+ RS-485 signal+ 10 Out1+ Analog output 1 out+ 5 D- RS-485 signal- 11 GND1 Analog output 1 out- 6 GND Power-, digital signal output GND 12 NC NC Form1: pin definition info@amazingelectronic.com Page 4 of 15

5 Figure2 DAM-DA Wiring diagram Figure3: DAM-DA Block diagram Initialization DAM-DA Module: All DAM-DA modules use RS-485 network, must distribute a only one address, between 00 and FF (hexadecimal), but, all new DAM-DA modules use a factory initialization set. As follows: Address: 00 (hexadecimal) Baud rate: 9600 bps Checksum: disabled Because address codes of new module are the same, their address will conflict to other modules, you must reconfigured every analog input address when you configure system. You can amend DAM-DA address by set command after connecting DAM-DA power line and RS485. Baud rate,checksum state also need be adjusted according to users demand. All these amendments should execute under default state. info@amazingelectronic.com Page 5 of 15

6 Let the modules into default state method: All DAM-DA modules have a Pin mark with INIT. Connect INIT Pin to ground (GND pin), then connect power supply, and then it is in default state. Its set as follows: Address: 00 Baud rate 9600 bps Checksum: disabled Then, can amend the DAM module s parameter as baud rate, checksum, and state by set command, and choose communication protocol trough set module communication protocol command. When not clear the module s specific configuration, can also make modules enter into default state through install jumping wire, then re-configure the module. If users want to set module in ModBus RTU communication Protocol, please see below description of MODBUS ASCII communication protocol command set: Every command is insists of a series characters, such as leading code, address ID, command, checksum, end symbol (cr). Except ** synchronous command, commands have effects on one module each time. Command format: (Leading Code)(Addr)(Command)[data][checksum](cr) (Leading Code) is the first letter of command. All commands need a leading code. such as:%, $,#,@, Character (Addr) is module address code, default value range is 00~FF (hexadecimal), 2- Characters (Command) represents command code or variable value Variable Length [data] some output command need data Variable Length [checksum] represents optional parameters, only need it when checksum is enabled. 2 -Characters (cr) terminating character, value is 0x0D 1- character When checksum is enabled, [Checksum] is required. Command and response must append checksum characters. Checksum is used to check all input command, to help you find the errors between host computer and module Calculating Method: two-character (hexadecimal), is the sum of all sending characters ASCII, then AND 0xFF. Example: Disable checksum command: $002(cr) response:! (cr) Enable checksum command: $002B6 (cr) response:! A9 (cr) $ = 0x24 0 = 0x30 2 = 0x32 B6=(0x24+0x30+0x30+0x32) AND 0xFF! = 0x21 0 = 0x30 2 = 0x32 6 = 0x36 A9=(0x21+0x30+0x30+0x30+0x32+0x30+0x36+0x30+0x30) AND 0xFF info@amazingelectronic.com Page 6 of 15

7 Command Response: Response message depends on all kinds of command. Command also insists of some characters, including leading code, variable and end symbol. Response message s leading code has 2 kind,! or > represents valid command,? stands for invalid. Through check response message can monitor command is valid or not. Remark: 1, under some circumstances, many command use similar command format. Make sure the address you used in the command is right, if you use wrong address, and this address represents another module, then the command will effective in another module, then cause to wrong. 2, Must use capital letter input command Analog Output Module Command Table: 1 Set Channel N Analog Output Value Command 2 Set Channel N Reset Analog Output Value Command 3 Set Analog Output Module Command 4 Read Set State 5 Offset Calibration 6 Span Calibration 7 Read Module Name 8 Channel N Analog Output Read-back Command 9 Set Communication Protocol Commands 1 Set N-Channel Analog Output Value Command Describe: As the current configuration data format, set analog output module N-channel output value Syntax:#AAN(data)(cr) # delimiter character AA is (range 00-FF) represents the 2-character hexadecimal address of the module. N Channel code 0 or 1 (cr) is the terminating character, carriage return (0Dh) Response : >(cr) command is valid.?aa(cr) invalid command or nonlicet operation > delimiter character There will be no response if the module detects a syntax error or communication error or if the specified address does not exist. Example: Command # (cr) Response >(cr) The channel 0 output value is mA at address 23H. 2 Set Channel N Reset Analog Output Value Command Describe: Set Channel N Reset Analog Output Value as present data formats. Syntax:#AASN(data)(cr) info@amazingelectronic.com Page 7 of 15

8 # delimiter character AA module address (range 00-FF) hexadecimal S set reset analog output value N Channel code 0 or 1 (data) set channel N reset output analog value.the data format is in Engineering Units,Percent of FSR, Two s complement hexadecimal. Refer to Chapter 3 Command Set. (cr) is the terminating character, carriage return (0Dh) Response : >(cr) command is valid.?aa(cr) invalid command or nonlicet operation > delimiter character There will be no response if the module detects a syntax error or communication error or if the specified address does not exist. Example: Command #23S (cr) Response >(cr) Channel 0 reset output is mA at address 23H. 3 Set Analog Output Module Command Describe: Set address, output range, baud rate, data format, checksum, status to analog output module. Configuration information is stored in nonvolatile memory EEPROM. Syntax:%AANNTTCCFF(cr) % delimiter character AA is (range 00-FF) represents the 2-character hexadecimal address of the module. NN New module hexadecimal address, NN range is 00-FF. TT hexadecimal represents type code. DAM-DA must be set 00. CC hexadecimal represents baud rate code. Baud rate code Baud rate baud baud baud baud baud baud baud baud Form2 Baud rate code info@amazingelectronic.com Page 8 of 15

9 FF DAM-DA (8-bit parameter) hexadecimalre presents data formats,checksum. Bit7 Bit 6 Bit 5 Bit 4 Bit 3 Bit2 Bit 1 Bit 0 Form 3 Data format, checksum Bit7:Reserved bit (set to 0) Bit6:checksum states, if 0:Disabled, if 1: Enabled Bit5-bit2:Not use (set to 0) Bit1-bit0:Data Format Bit 00:Engineering Units 01:% of FSR 10:Twos complement hexadecimal 11:ohms Response Syntax:!AA(cr) command is valid?aa(cr) command is invalid or nonlicet operation, or do not set up line before changing baud rate or checksum! delimiter character which indicates a valid command.? delimiter character which indicates a invalid command. AA represents module address If you configure module for the first time, A=00 NN equals to new address. If reconfigure module changing address, input range, and data formats, AA equals to present or new address. If reconfigure module changing baud rate or checksum state, must install command string, make them in listening mode, module address is 00H, also AA=00H, NN=present or new address. There will be no response if the module detects a syntax error or communication error or if the specified address does not exist. Example: Command % (cr) Response!11(cr) Description: % delimiter character 00 indicates analog input module initial address that you want to set is 00H 11 indicates new module hexadecimal address is 11H 00 indicates type code, DAMDA must be set indicates baud rate: 9600 baud 00 indicates data format is Engineering Units,checksum is disabled 4 Read Set State Describe: Read set for the specified a analog output module. Syntax: $AA2(cr) $ delimiter character AA module address, (range 00-FF) hexadecimal info@amazingelectronic.com Page 9 of 15

10 2 indicates read set state command Response Syntax:!AATTCCFF(cr) command is valid?aa(cr) command is invalid or nonlicet operation! delimiter character AA represents module address TT Type Code CC Baud rate code, form 3 FF form 4 There is no response if the module detects a syntax error or communication error or if the specified address does not exists. Example: command $302(cr) Response!300F0600(cr)! delimiter character 30 indicates analog input module address is 30H 00 indicates that output type code 06 represents that baud rate is 9600 baud 00 represents that data format is Engineering Units, disable checksum 5 Offset Calibration Command Describe: Calibrates an analog output module channels N to correct for offset errors Syntax: $AA1N(cr) $ delimiter character AA module address, (range 00-FF) hexadecimal 1 represents offset calibration command N channels code 0~1 Response:! AA (cr) command is valid?aa(cr) command is invalid or nonlicet operation! delimiter character which indicates a valid command.? delimiter character which indicates a invalid command. AA represents module address Products have been calibrated, user can use them directly. After calibrating offset command, then calibrate gain errors. In the calibration, analog output modules need to be calibrated channel connected to the multimeter to monitor the output signal, through the first command set command to set the analog output, regulated to multimeter inside shows the value of the output signal is zero, and then enter the calibration bias shift command, see the specific calibration methods calibrate the module sections. There is no response if the module detects a syntax error or communication error or if the specified address does not exist. info@amazingelectronic.com Page 10 of 15

11 Example: command $2310(cr) Response!23 (cr) Calibrate offset channel 0 at address 23H module. 6 Span Calibration Description: Calibrates an analog output module channles N to correct for gain errors Syntax: $AA0N(cr) $ delimiter character AA module address, (range 00-FF) hexadecimal 0 represents gain calibration commandre N channels code 0~1 Response:!AA(cr) command is valid?aa(cr) command is invalid or illegal operation! delimiter character which indicates a valid command.? delimiter character which indicates a invalid command. AA represents module address Products have been calibrated, user can use them directly. After calibrating offset command, then calibrate gain errors. In the calibration, analog output modules need to be calibrated channel connected to the multimeter to monitor the output signal, through the first command set command to set the analog output, regulated to multimeter inside shows the value of the output signal is zero, and then enter the calibration bias shift command, see the specific calibration methods calibrate the module sections. There is no response if the module detects a syntax error or communication error or if the specified address does not exists. Example: command $2300(cr) Response!23 (cr) Calibrate gain errors channel 0 at address 23H module. 7 Read Module Name Description: Return the module name from the specified analog output module Syntax: $AAM(cr) $ delimiter character AA module address, (range 00-FF) represents the 2-character hexadecimal M represents Read module name command Response:!AA(ModuleName)(cr) command is valid?aa(cr) command is invalid or nonlicet operation! delimiter character which indicates a valid command.? delimiter character which indicates a invalid command. AA represents input module address (ModuleName) is DAM,DAM so on, represents module type There is no response if the module detects a syntax error or communication error or if the specified address does not exist. info@amazingelectronic.com Page 11 of 15

12 Example: Command $08M(cr) Response!08ISODA (cr) Counter Module is ISODA at adress 08H 8 Channel N Analog Output Read-back Command Description: Analog output module Channel N Analog Output Value Read-back. Command Syntax: $AADN(cr) $ delimiter character AA module address, (range 00-FF) hexadecimal D Analog output read-back command N Channel code 0 or 1 Response Syntax:!AA(data)(cr) command is valid?aa(cr) command is invalid or illegal operation! delimiter character AA represents input module address (data) represents back to read the output channel N analog data. The data format is in Engineering Units Percent of FSR, Two s complement hexadecimal. Refer to Chapter 3 Command Set. There is no response if the module detects a syntax error or communication error or if the specified address does not exists. Example: Command $23D0 (cr) Response! (cr) Channel 0 present output value is mA at address 23H. 9 Set Communication Protocol Commands Description: Choose ASCII command set or MODBUS RTU as operation protocol Command Syntax: $AAPV(cr) $ delimiter character AA module address, (range 00-FF) hexadecimal P command code V Protocol code. 0: ASCII command set; 1: MODBUS RTU Response:!!AA (cr) command is valid?aa(cr) command is invalid or nonlicet operation! delimiter character which indicates a valid command.? delimiter character which indicates a invalid command. AA represents output module address There is no response if the module detects a syntax error or communication error or if the specified address does not exists. Example 1: Command $00P1(cr) Response!00 (cr) info@amazingelectronic.com Page 12 of 15

13 Choose MODBUS RTU protocol Example 2: Command $00P0(cr) Response!00 (cr) Choose ASCII command set Output Ranges& Data Formats: Analog output has three data formats: 00:Engineering Unit 01:% of FSR 10:Twos complement hexadecimal Form 4 A4:4-20mA Output Range Data Format Max. Min. Engineering Unit % of FSR Twos complement hexadecimal FFF 333 A3:0-20mA Engineering Unit ± % of FSR ± Twos complement hexadecimal FFF 000 U1:0-5V Engineering Unit ± % of FSR ± Twos complement hexadecimal FFF 000 U2:0-10V Engineering Unit ± % of FSR ± Twos complement hexadecimal FFF 000 U5:0-±5V Engineering Unit % of FSR Twos complement hexadecimal FFF 000 U8/A8:User define Engineering Unit ± % of FSR ± Twos complement hexadecimal FFF 000 A7:0-±20mA Engineering Unit % of FSR Twos complement hexadecimal FFF 000 U6:0-±10V Engineering Unit % of FSR Twos complement hexadecimal FFF info@amazingelectronic.com Page 13 of 15

14 Example: 1. Output range A4:4-20mA, setting output value for 4mA Engineering Units user command: # (cr) % of FSR user command: # (cr) Twos complement hexadecimal user command: #010333(cr) 2. Output range U1:0-5V, setting output value for 3V Engineering Units user command: # (cr) % of FSR user command: # (cr) Twos complement hexadecimal user command: #010999(cr) Module Calibration Products have been calibrated, the user can use directly without calibration. In the process, you can use the product calibration function to re-calibrate the module. In the calibration, the module need use a high-precision multimeter to monitor the module output signal. In order to improve calibration precision, suggest doing as the following meters: A five and a half or more high-precision voltage / current measurement instrument for monitoring the accuracy of the output signal Calibration Process: 1. Select the output channel to be calibrated in accordance with the scope of the module connected to the corresponding output voltage or current measurement instruments. 2. Set analog output modules need to calibrate the output of the channel zero signals, typically 0mA, 4mA or 0V and so on. Through the first command set command to set the analog output, adjust to the measuring instrument inside shows the value of the output signal is zero. 3. Until the signal stabilized, the analog output module to send $ AA1N offset calibration command (N representing the current channel being calibrated code, 0 or 1). 4. Set analog output modules require full-scale calibration channel output signal. Through the first command set command to set the analog output, adjust to the measuring instrument where the output signal is shown in full scale value. 5. Until the signal stabilized, the analog output module to send $ AA0N gain calibration command (N representing the current channel being calibrated code, 0 or 1). 6. Finished MODBUS RTU : The device is set ASCII command as default protocol, if need change to MODBUS RTU, follow below step to change: 1. Short connecting INIT(PIN 3) and GND(PIN 6) 2. Correctly link Power and communication interface cables 3. Switch on power supply, the module automatically enter the default state, communication address is 00, the baud rate of Wait for one minute, Module initialization 5. Send command $00P1(cr), response should be!00(cr) 6. Switch off power supply, break off INIT and GND 7. Now device successfully in MODBUS RTU protocol The Modbus function codes of modue support are 03 and 06. Modbus data content and output info@amazingelectronic.com Page 14 of 15

15 corresponding relation see Form 4,it is the same as the character data format for Twos complement hexadecimal Register Specification: Addr Content R/W Description 4X Out0(0x0000-0x0FFF) Read/Write Output data of Channel Out1(0x0000-0x0FFF) Read/Write Outpur data of Channel S0ut0(0x0000-0x0FFF) Read/Write Sout1(0x0000-0x0FFF) Read/Write Dimension: (unit:mm) Contact us ADD: No. 520, Building 1, Jiamei Industrial Park, Longwei Road, Futian District, Shenzhen,China info@amazingelectronic.com Page 15 of 15