YOKOGAWA UT150L, User Manual

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IM 05C01E22-10E
3-7
Chapter 3 PC Link Communication
3.2.3 Commands
BRD Reads 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 speci-
fied I relay number.
• The number of bits to be read at a time is 1 to 48.
• 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 command element in the command.
●
Command/Response (for normal operation)
Number of
Bytes
Command
element
1
STX
2
Address
number
(ADR)
5
I relay
number
1
Comma
or space
3
Number
of bits
(n)
2
CPU
number
01
2
Checksum
3
BRD
1
ETX
1
CR
1
0
Number of
Bytes
Response
element
1
STX
2
Address
number
(ADR)
2
CPU
number
01
…
…
1
dn
2
Checksum
1
ETX
1
CR
2
OK
1
d1
1
d2
1
d3
dn: read data to the extent of the specified number of bits (n = 1 to 48)
dn = 0 (OFF)
dn = 1 (ON)
The response is “0” when the status is OFF or “1” when ON.
●
Example: Reading the status of alarm 1 of the UT150L with address number 01
The following command reads the status of alarm 1 (I0001) at 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.