Operating instructions

Transcription

1 COUNTERS CONTROLLERS ENCODERS Operating instructions Interface description BE134 Prog. 01 Table of contents 1. General information Transmission protocol Reading of storage locations Examples for reading storage locations Programming of storage locations Examples for programming storage locations Special statements Deletion of the counter counts Switching the counter to PGM mode or RUN mode Line feeding Reading out the counter identification Error messages during the transfer of data List of the control characters used Operating scheme Programming scheme /1 P.O Box 3360 x D Villingen-Schwenningen Subject to technical as well as Phone +49 (0) x Fax +49 (0) design errors and modifications x info@ivo.de

2 Interface description BE General information The serial interface can fulfill the same functions as the display and the keys on the counter. Via the interface, data can be called up and parameters can be reprogrammed. When used with the serial interface, the counter is generally operated by a personal computer. Therefore, the external device is subsequently abbreviated as PC. It is, however, also possible to use a different device with similar characteristic features. 2. Transmission protocol The transmission is effected character-by-character in the ASCII code. Each character consists of 8 bits. The 8 th bit is the parity bit, in case of "no parity", the 8 th bit is always sent null. Upon each enquiry by the PC, the counter sends an acknowledgment via the serial interface, provided that the data transmission was correct. A transmission of characters is started with a start character <STX> and terminated with a terminator <ETX>. In addition, the counter sends a <CR> (carriage return) after the <ETX>, enabling the reading in (in high-level programming languages such as BASIC or similar languages) of a complete data block with one statement. The <STX> is followed by an address assigned to the counter. Thus it is possible to address the relevant counter in a serial network. After the address, the line (position) to be read out or to be programmed is entered. In case of a programming statement, a "P" (program) and the data (parameter) follow. As explained below, the protocol is divided up into 3 groups: a) Reading of storage locations (READ statement): <STX> address line <ETX> [<CR>] b) Programming of storage locations (WRITE statement): <STX> address line P data <ETX> [<CR>] c) Special statements: Example: <STX> address parameter <ETX> [<CR>] <STX> Start of text (02Hex) Address (device address) Line 01..XX (see operating scheme) P Programming statement Data Programming data Parameter Special statements <ETX> End of text (03Hex) <CR> 0DHex (control character "carriage return") "CR" does not have to be indicated (optional), is however always sent back by the counter. General <STX> address line <ETX> (address=35; line=02) ASCII <STX>3502<ETX> Hex 02H,33H,35H,30H,32H,03H Important! The blanks between the individual characters in the statements merely serve for a clearer presentation. The inputting at the PC must be done without blanks. In the description, control characters (less than 20Hex) are put into angle brackets. If the PC sends a wrong protocol, the counter will send back an error message, provided that the counter is still ready to receive. For further information read the section error messages on page 5. 2

3 BE134 Interface description 3. Reading of storage locations All storage locations provided with a line number in the programming scheme (apart from the separation lines that are marked with dashes) can be read out. The protocol: <STX> address line <ETX> [<CR>] is applicable to every line. The counter s acknowledgment may, however, vary from line to line as regards the protocol length. This depends on the data length of the respective storage location. The counter can be read out both in the RUN mode and in the PGM mode. The only difference is that upon the counter s acknowledgment, the mode parameter sends back an "R" or a "P" as detailed below. Acknowledgment to a read statement (general): <STX> address line mode data <ETX> <CR> Mode Data P = Counter is in the programming mode R = Counter is in the RUN mode Max. number of digits, with high-order zeros, without decimal point 3.1. Examples for reading storage locations The following setting applies to the subsequent examples: Device address = 35; mode of counter = R (RUN mode) Reading out of the counter count (line=01, display value=1500) <STX>3501<ETX> Acknowledgment: <STX>3501R001500<ETX><CR> Reading out of the totalizer (line=05, display value=12300) <STX>3505<ETX> Acknowledgment: <STX>3505R <ETX><CR> Reading out of the batch counter (line=06, display value= 10) <STX>3506<ETX> Acknowledgment: <STX>3506R000010<ETX><CR> Reading out of the basic display (line=27, setting=pos. 2) <STX>3527<ETX> Acknowledgment: <STX>3527R2<ETX><CR> (2 corresponds to: preselection value P2) Reading out of the device address (line=54, device address=35) <STX>3554<ETX> Acknowledgment: <STX>3554R35<ETX><CR> 4. Programming of storage locations All storage locations provided with a line number in the programming scheme, with the exception of the separation lines (marked with dashes) and the lines 1, 5 and 6 can be programmed. The protocol: <STX>address line P data <ETX> [<CR>] is applicable to every line. The counter s acknowledgment, which is sent back after each programming, is the same as when reading out the line. All storage locations can be programmed both in the RUN mode and in the programming mode. Programming in the RUN mode: The data in the lines 21, 22, 23, 24, 25, 30, 33, 35 and are not taken over internally until a change from the PGM mode to the RUN mode has been effected. For changing over to the PGM mode see 5.2. The remaining lines are active immediately after the programming. All data programmed in the RUN mode are not taken over to the nonvolatile memory until a change from the PGM mode to the RUN mode has been effected. If there is no PGM/RUN change, the old data will be valid again after a mains failure. Write statement (general): <STX> address line P data <ETX> [<CR>] 3

4 Interface description BE Examples for programming storage locations The following setting applies to the subsequent examples: Device address = 35; mode of counter = R (RUN mode) Programming of the preselection value P1 (line=02, preselection value=3600) Statement: <STX>3502P003600<ETX> Acknowledgment: <STX>3502R003600<ETX><CR> Programming of batch counter mode (line=16, setting=2) Statement: <STX>3516P2<ETX> Acknowledgment: <STX>3516R2<ETX><CR> Programming of the lower display (line=27, preselection value P1=1) Statement: <STX>3527P1<ETX> Acknowledgment: <STX>3527R1<ETX><CR> Programming of the pulse signal duration P1 (line=41, permanent signal= Latch) Statement: <STX>3541PL<ETX> Acknowledgment: <STX>3541RL<ETX><CR> Programming of the device address (line=54, device address=27) Statement: <STX>3554P27<ETX> Acknowledgment: <STX>3554R27<ETX><CR> 5. Special statements With the exception of the statement "Delete counter count", the special statements are statements that do not refer to a line number (storage location in the operating scheme) Deletion of the counter counts The main counter (line 1), the totalizer (line 5) or the batch counter (line 6) can be deleted via the following special statement. These are lines that cannot be programmed. All remaining lines in the programming scheme (apart from the separation lines) are deleted by programming the value 0 (as explained under point 4.). The delete statement corresponds to a via the key C. The acknowledgment (reply) of the counter upon deletion is the same as in case of the read statement of the respective line. General: <STX> address line <DEL> <ETX> Example: Deleting the batch counter b Address=35, line=06, mode=run mode Statement: <STX>3506<DEL><ETX> <DEL> = 7FHex Acknowledgment: <STX>3506R000000<ETX><CR> 5.2. Switching the counter to PGM mode or RUN mode This statement allows the switching of the counter between the PGM mode and the RUN mode with each enquiry. As acknowledgment the address and the current mode are sent back after the execution of the statement. General: <STX> address <DC1> <ETX> Example: Address=35, mode=run mode, current line= 1, display value=15 Statement: <STX>35<DC1><ETX> <DC1> = 11Hex Acknowledgment: <STX>35P<ETX><CR> Repeating the statement reactivates the RUN mode Statement: <STX>35<DC1><ETX> Acknowledgment: <STX>35R<ETX><CR> 5.3. Line feeding The statement allows the feeding of the display to the next line. The function is possible both in the RUN and in the PGM mode. The data of the current line (after the feeding) are sent back as acknowledgment. Example: Address=35, mode=run mode, feeding from line 1 to line 2 Statement: <STX>35<LF><ETX> <LF> = 10Hex Acknowledgment: <STX>3502R000100<ETX><CR> 4

5 BE134 Interface description 5.4. Reading out the counter identification The identification data can only be read. The address is followed by two parameters. The statement parameter "I" (for identification) and the selection parameter "T" (type and program number) or "D" (date and hardware version) for the different identification data. Reading out type of device and program number: Address=35, type=be134, program number=01 Statement: <STX>35IT<ETX> Acknowledgment: <STX>35BE134 01<ETX><CR> Reading out date and release number: Address=35, date= , release number=1 Statement: <STX>35ID<ETX> Acknowledgment: <STX> <ETX><CR> 6. Error messages during the transfer of data If the PC sends a wrong data protocol to the counter (e.g.: not existing line or letters instead of numerals), a respective error message will be sent back by the counter, provided that the counter is still ready to receive. In order to receive an error message in case of an error, at least the control character <STX> and the address must be correct. If this is not the case, the counter will no longer be ready to receive, with the result that no acknowledgment can be sent back to the PC. If no acknowledgment, and thus no error message, is received in case of PC enquiry, a fatal error has occurred. This can apply if the control character <STX> or the address is missing and if the interface parameters of the PC and the counter do not correspond. If this is, however, correct, the reason can only be an error of the hardware or of the data line. General structure of the error messages: <STX> address line mode <CAN> error number <ETX> <CR> Example: Address=35, line=09 (invalid line), error number=2 <STX>3509R<CAN>2<ETX><CR> When the error message is returned, the two positions "line" und "mode" are dropped Detailed error description: Error 1 : Error 2 : Error 3 : Format error (<ETX> is not positioned correctly). This error occurs e.g. if the data format is not observed during the programming (e.g.: when programming the preselection value, only 5 data positions are transmitted instead of 6) Line (position) does not exist or separation line Parameter error (invalid values in the protocol). That means, for example, that the preselection value does not only consist of numerals but also of other invalid signs or that a given value is not within a permissible range. 7. List of the control characters used Control character Hex Decimal <STX> <ETX> <LF> 0A 10 <CR> 0D 13 <DC1> <CAN> <DEL> 7F 127 5

6 Interface description BE Operating scheme Line Factory setting Customer program Brief description P h P P 2 Ph - Time meter (main counter) P1 - Preselection value 1 P2 - Preselection value t o t b tot Totalizer b - Batch counter Separation line 11 S t A t P h 12 S t A t P 1 13 S t A t P 2 15 S t A t t o t 16 S t A t b Ph - Time meter (main counter) P1 - Preselection value 1 P2 - Preselection value 2 tot Totalizer b - Batch counter Separation line 6

7 BE134 Interface description Line Factory setting Customer program Brief description Operating modes main counter Preselection mode Resetting modes Time range and fine scaling for Ph main counter Time range and fine scaling for totalizer Indication of the measuring unit on the display Allocation of the lower display Function of the signal inputs A, B Input logic and switching thresholds of the signal inputs Function control input 1 (port 9) Minimum pulse duration for control input 1 Function control input 2 (port 10) Function control input 3 (port 11) Taking over of the preselections P1, P2 Output logic Pulse signal duration P1 Pulse signal duration P2 Code setting Baud rate Parity Stop bits Address Separation line 7

8 Interface description BE Programming scheme Lines Status for line Parameter can be changed 1 Deletion or input disabled 2 Parameter is skipped Line 21 Operating modes main counter 0 * Add. end signal in case of P2, ting to 0 1 Sub. end signal in case of 0, ting to P2 Line 22 Preselection mode 0 * Main counter 2 preselections (progressive preselections) 1 Main counter 2 preselections (P1 = trailing preselections) 2 Main counter with preselection P2, batch counter with P1 Line 23 Resetting modes 0 * Main counter and batch counter with auto 1 Main counter without, batch counter with auto 2 Main counter with, batch counter without auto 3 Main counter and batch counter without auto Line 24 Time range and fine scaling for Ph main counter 0 * s min min h Line 25 Time range and fine scaling for totalizer 0 * same as main counter h Line 26 Indication of the measuring unit on the display 0 * without measuring unit 1 h 2 min 3 s Line 27 Allocation of the lower display 0 without lower display 1 P1 - Preselection value 2 * P2 - Preselection value 3 tot Totalizer 4 b - Batch counter Line 30 Function of the signal inputs A, B 0 * Time metering while signal A is active/ signal B has no function 1 Count start on signal A. Count stop upon reaching preselection P2. Count halt during signal B. Signal A and B pulse edge active. 2 Count start and on signal A. Stop and upon reaching preselection P2. Count halt during signal B. Signal A and B pulse edge active. Line 33 Input logic and switching threshold signal inputs 0 * PNP Switching threshold 6V 1 NPN Switching threshold 6V 2 PNP Switching threshold 3V 3 NPN Switching threshold 3V Line 35 Minimum pulse duration for control input 1 0 * 30 ms µs Line 36 Function control input 2 (port 10) 0 Ph main counter - static 1 Ph main counter - pulse edge active 2 * Ph main counter and totalizer stop 3 Hold 4 Programming lock 5 Key lock 6 Print 7 ext. counting input for batch counter Line 37 Function control input 3 (port 11) 0 * tot Totalizer - static 1 tot Totalizer - pulse edge active 2 b Batch counter - static 3 b Batch counter - pulse edge active 4 Programming lock 5 Key lock 6 Print 7 ext. counting input for batch counter Line 38 Taking over of the preselections P1, P2 0 * Effective immediately after input 1 Not effective until the counter has been Line 40 Output logic 0 * Both outputs as make contacts 1 P1 break contact, P2 make contact 2 P1 make contact, P2 break contact 3 Both outputs as break contacts Line 41 Pulse signal duration P Minimum signal duration 0.25 * Default Maximum signal duration Latch Permanent signal (by pressing the key C) Line 42 Pulse signal duration P Minimum signal duration 0.25 * Default Maximum signal duration Latch Permanent signal (by pressing the key C) Line 50 Code setting 0000 * Code not active : 9999 Line 51 Baud rate 0 * 4800 baud baud baud baud Line 52 Parity 0 * Even parity 1 Odd parity 2 No parity Line 53 Stop bits 0 * 1 Stop bit 1 2 Stop bits Line 54 Address 00 * Default 00 Min. 99 Max. Line 34 Function control input 1 (port 9) 0 * Ph main counter - static 1 Ph main counter - pulse edge active 2 Ph main counter and totalizer - stop 3 Hold 4 Programming lock 5 Key lock 6 Print (min. pulse duration 30ms) 8