Instruction Manual

<Toc> <Ind> <3. PC Link Communication >
3-9
IM 77J04J11-01E 1st Edition : 2006.08.25-00
BRR Reads I relays on a bit-by-bit basis in random order
● Function
Reads the ON/OFF statuses of the individuaI I relays specified in random order by the
specified number of bits.
• The number of bits to be read at a time is 1 to 32.
• 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)
Number of Bytes 1 2 2 1 3 2 5 1 5 1
Command
element
STX Address
number
(ADR)
CPU
number
01
0 BRR Number
of bits
(n)
I relay
number 1
Comma
or space
I relay
number 2
Comma
or space
• • • I relay
number n
Checksum ETX CR
• • •
5211
Number of Bytes • • • 112 2211 2 11
Response
element
STX Address
number
(ADR)
CPU
number
01
OK d1 d2 CR• • • dn Checksum ETX
Responses 0 and 1 indicate OFF and ON respectively.
Command (continued)
dn: read data of the specified number of bits (n=1 to 32)
dn=0(OFF)
dn=1(ON)
● Example:
Reading the statuses of alarms 1 and alarm 2 of the M Series with address number 01.
The following command reads the statuses of alarm 1 (
I0001) and alarm 2 (I0002) of
address number 01.
[Command]
[STX]01010BRR02I0001,I00027B[ETX][CR]
The ON and OFF responses are returned for alarm1 and alarm 2 respectively with respect
to the above command.
[Response]
[STX]0101OK10BD[ETX][CR]
Alarm 1 has been ON.