Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 761

Hayes Modem AT Command Protocol
Password Verification Operation
The number of retries is 3 for password verification.
Data Send/Receive (Sequence No. 553 (Hex 0229))
Data Send/Receive can be executed using sequence No. 553. The send data sent to another exchange is set
in the words specified by the 3rd operand of PMCR(260). Data received by the PLC is stored in the words
specified by the 4th operand of PMCR(260).
Operand and Send/Receive Data Word Settings of PMCR(260)
732
PLC
Password verification
(starting #552)
Dispatching
character string
(Retry up to 3 times)
Receiving
password
Verifying
password
Verification
result
Terminating
process
OPR 2 #0229
OPR 3 First address C1 of the words where send data is set
OPR 4 First address C2 of the words where receive data is stored
• Send Data Words
C1+0 Number of words from address set for operand 2 to end of data 4 digits Hex
C1+1 Number of bytes of send data
C1+2 Send data (dialling operation)
: (Fill data to left for odd numbers of bytes)
C1+n
• Receive Data Storage Words
C2+0 Number of bytes of receive data
C2+1 Receive data (dialling operation)
: (Fill data to left for odd numbers of bytes)
C2+n
Personal computer
(remote exchange)
"Password: "
Receiving character
Issuing password
Password
When Protocol Macro Execution Flag turns ON:
Port 1: CIO 190915 for the Serial Communica-
tions Board and CIO 1500 + 25 x unit number
+9, bit 15 for Serial Communications Units.
Port 2: CIO 191915 for the Serial Communica-
tions Board and CIO 1500 + 25 x unit number
+19, bit 15 for Serial Communications Units.
Appendix Q
string
4 digits Hex
ASCII
4 digits Hex
ASCII