Yokogawa JUXTA VJ Series Limit Alarms Instrukcja Użytkownika Strona 20
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IM 77J01J11-01E
3.2.2 BRD Reading I Relays on a Bit-by-bit Basis
● Function
Reads a sequence of contiguous ON/OFF statuses by the specified number of bits starting
at a specified I relay number.
• The number of bits to be read at a time is 1 to 256.
• For the format of response in the event of failure, see subsection 3.1.2.
• The command shown below includes the checksum function. When performing
communication without a checksum, do not include the 2-byte checksum command
element in the command.
● Command/Response (for normal operation)
Command
Element
STX Address
number
(ADDRESS)
CPU
number
01
0 BRD ETX CRI relay
number
Comma
or space
Number
of bits
(n)
Checksum
OK d1 d2 d3 ETX CRResponse
Element
STX Address
number
(ADDRESS)
CPU
number
01
• • • dn Checksum
The response is “0” when the status is OFF or “1” when ON.
Number of Bytes
• • •
1 2 2 2111 1 2 1 1
Number of Bytes 12 2135 13 2 11
dn: reads data of the specified number of bits (n=1 to 256)
dn=0(OFF)
dn=1(ON)
030206E.EPS
● Example:
Reading the status of alarm-1 of the VJ Series signal conditioner with communication
address-1.
The following command reads the status of alarm-1 (I0009) at communication address-1.
[Command]
[STX]01010BRDI0009,00199[ETX][CR]
The following response is returned with respect to the above command. (Alarm-1 is ON.)
[Response]
[STX]0101OK18D[ETX][CR]
Alarm has been ON since "1" was returned.
030207E.EPS
3rd Edition : Oct. 15, 2007-00
- VJ Series 1
- Communication Functions 1
- Introduction 3
- Documentation Conventions 4
- Modification 5
- ■ Force Majeure 6
- CONTENTS 7
- 1. Setup 9
- IM 77J01J11-01E 10
- ● Address number (ADDRESS) 11
- ● Parity (PARITY) 11
- ● Stop bit (STOP BIT) 11
- ● Data length (DATA LEN) 11
- Blank Page 12
- 3. PC Link Communication 15
- 030230E.EPS 18
- 3.2 Commands 19
- Command Description 19
- 030203E.EPS 19
- ● Function 20
- ● Example: 20
- 030212E.EPS 22
- 500 in decimal 25
- (input is 50.0 %) 25
- (output is 50.0 %) 25
- Word-by-word Basis 26
- [STX]01010WRME8[ETX][CR] 27
- CPU number: 01 27
- Revision 28
- Graphic panel 35
- 4. Ladder Communication 37
- 4.2.2 Reading Parameters 39
- 4.2.3 Response Error Codes 40
- 5. MODBUS Communication 41
- 050103E.EPS 42
- 5.1.2 Specifying D Registers 43
- 5.2 Function Codes 44
- 050205E.EPS 45
- : 01030400010000F7[CR][LF] 46
- 050216E.EPS 47
- ● Response Error Codes 48
- SCADA Software 49
- 050302J.EPS 50
- 6.1 Overview of D Registers 51
- 6.3 D Register Map Table 52
- 6.3.1 Contents of D Registers 53
- 060304E.EPS 54
- PC link communication 55
- 7.1 Status 56
- Appendix Table of ASCII Codes 57
- (Alphanumeric Codes) 57
- Revision Information 59
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