When The Instruction Completed With An Error - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

■When the instruction completed with an error (timeout error)
ECPRTCL instruction
Completion device
Completion device + 1
Ethernet-equipped module
External device
*1 When the receive packet (expected packet) verification does not match before the reception wait time, or when other device existence
cannot be checked within the destination alive check time (time calculated from destination alive check start interval timer value,
destination alive check interval timer value, and destination alive check resend count).
• When variables are included in receive packet (expected packet) elements, variable data are not verified.
• Up to 16 receive packets (expected packets) can be specified.
• When multiple packets are specified, the received data is verified with the registered receive packet
(expected packet) in the order of registration. The receive processing is completed when a matching
receive packet (expected packet) is found, and the subsequent verification is canceled.
• The number of the matching received packet is stored in the control data of the ECPRTCL instruction and
the buffer memory.
• For details on errors that occur when the communication completed abnormally, refer to the error code
stored in the buffer memory. ( Page 310 List of Error Codes)
t: waiting time to receive or the time specified
by the destination alive check timer
The receive data
did not match the
receive packet
(expected packet).
Receive data Receive data
Appendix 10 Operation Image and Data Structure of Predefined Protocol
An error has
occurred.
The device
turns on upon
abnormal end.
*1
A
APPX
397