6F8C0904 73
5.3 PC Link Protocol Transmission (Data write)
5
Register write request (using the USEND_T instruction)
The register data specified by the local station is written to the specified register on the
remote station.
(1) Request command structure and error status
<Request command>
• Local station register is specified by the input operand P of the USEND_T function
block.
• Transfer register size is specified by the input operand N of the USEND_T function
block.
Specify in words: 1 to 485 words
T register and C register: 1 to 323 words
<Error status>
Error status examples
F0
CMD Destination EN311 module slot number
CMD+1 Command (16#0321)
CMD+2 DRID Remote station register type code
CMD+3 DregNo Remote station register number
CMD+4 TimeCnt Timeout time
CMD+5 D-IP address: The input format is the same
as that for parameter setup
requests.
Remote station IP address
CMD+6
CMD+7 D-UDP PortNo Remote station message
transmission UDP port number
F0
STATUS
=0: Normal completion, ≠ 0: Error status
Error status number Description
-5001(16#EC77) Command type error
-5002(16#EC76) Timeout (detected by the S controller)
2848(16#B20) Timeout (detected by the EN311)
Supplemental Remarks
When the PC link is used and the EN311 detects an error, it means that the error occurred in the
local station if the highest bit of the error status shows 0 or it means that error occurred in the
remote station if the bit shows 1. Therefore, the error is in local station if the error status value is
positive or the error is in remote station if the value is negative.
To Next Page
Loading...
Need help?
General
