Mitsubishi Electric CC-Link IE TSN User Manual page 86

■When the process is completed with an error (abnormal response from the target station)
'Setting data' (16002H to 1601FH)
'Handshake flag' (16000H)
'Completion status' (16001H)
'Read data storage buffer'
(16220H to 163FFH)
Processing of the NZ2GN-GFB
Target station
Writing the remote buffer memory
Reading the remote buffer memory
Executed by the NZ2GN-GFB
Executed by the program
(1) Same operation as when the process is completed successfully.
(2) Same operation as when the process is completed successfully.
(3) Transient transmission (REMFR instruction) is completed with an error, so the system stores the error code as the completion status, and the handshake
flag is updated to 04H (Reception request).
(4) Once it has been confirmed that the handshake flag has been updated to 04H (Reception request), the completion status is read. The completion status is
not 0 (error code), so data is not written from the read data storage buffer and FFH (Received successfully) is written as the handshake flag.
(5) The system updates the handshake flag to 00H (Idle).
Error code
When the process is completed with an error, the error code is stored in 'Completion status' (16001H).
For details, refer to the following.
Page 166 Error codes stored in 'Completion status' (16001H).
Program example
For details, refer to the following.
Page 107 Program example (2)
7 FUNCTIONS
84
7.2 Transient Transmission
(1)
Setting
value A
(1)
00H 01H
(4)
0 (initial value)
(2)
Operation starts with
the setting value B.
Setting value B
02H 03H
(4) (4)
(3)
(2) (3)
An abnormal response is
received from the target station.
(2) (3)
Data A
(4)
04H FFH
(4) (5)
Error code 0 (initial value)
(4) (5)
00H