Yokogawa JUXTA M Series Digital Limit Alarms MVTK - Manual (Page 21)

<3. PC Link Communication >
3-7
IM 77J04J11-01E 1st Edition : 2006.08.25-00
BRD Reads I relays on a bit-by-bit basis
●
Function
Reads the ON/OFF statuses of a sequence of contiguous I relays 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 checksum, do not include the 2-byte
checksum element in the command.
●
Command/Response (for normal operation)
Command
element
STX Address
number
(ADR)
CPU
number
01
0 BRD ETX CR I relay
number
Comma
or space
Number
of bits
(n)
Checksum
OK d1 d2 d3 ETX CR Response
element
STX Address
number
(ADR)
CPU
number
01
• • • dn Checksum
Responses 0 and 1 indicate OFF and ON respectively.
Number of Bytes • • • 1 2 2 2 1 1 1 1 2 1 1
Number of Bytes 1 2 2 1 3 5 1 3 2 1 1
dn: read data of the specified number of bits (n=1 to 256)
dn=0 (OFF)
dn=1 (ON)
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Example:
Reading the status of alarm 1 of the M Series with address number 01.
The following command reads the status of alarm 1 (I0001) of address number 01.
[Command]
[STX]01010BRDI0001,00191[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.