Transient Transmission With Other Stations Using Remote Buffer Memory - Mitsubishi Electric CC-Link IE TSN User Manual

Transient transmission with other stations using remote buffer
memory
Transient transmission can be performed with another station that is connected to CC-Link IE Field Network by reading/writing
the NZ2GN-GFB remote buffer memory from the program of the CPU module of the CC-Link IE TSN master station when the
NZ2GN-GFB is used as the CC-Link IE Field Network master station.
Transient transmission that can be executed
Reads data in units of words from the buffer memory in the intelligent device station/remote device station.
Writes data in units of words to the buffer memory in the intelligent device station/remote device station.
Reads the specified points of data from the target station device.
Writes the specified points of data to the target station device.
Data is written to or read from the specified target station using the 'Transient transmission area with another station' (16000H
to 163FFH) of the remote buffer memory. ( Page 264 Setting value)
The handshake flag is used to control the writing and reading of data to/from the target station.
The transient transmission response wait timeout is 10 seconds.
Data is not resent, so resend it again using the program if necessary.
Handshake flag
The following shows the how the status of 'Handshake flag' (16000H) of remote buffer memory changes.
00H: Idle
*1
(1)
01H: Send request
(2)
02H: Data sending
(2)
(2)
03H: Waiting for receiving data
(2)
04H: Receive request
*2
(1)
FFH: Data receiving completed
successfully
*1 When the handshake flag is 00H (Idle), 01H (Send request) can be written.
*2 When the handshake flag is 04H (Reception request), FFH (Received successfully) can be written.
*3 When the handshake flag is FEH (Transmission completed with an error), 00H (Idle) can be written.
If the above is not observed, the written value is ignored and the completion status becomes an error (error
code: 0001H).
(2)
FEH: Data sending completed
with an error
Notes
Same behavior as the REMFR and
REMFRD instructions.
Same behavior as the REMTO and
REMTOD instructions.
Same behavior as the RIRD instruction.
Same behavior as the RIWT instructions.
(1) User writes the data.
(2) System updates.
*3
(1)
7.2 Transient Transmission
7
7 FUNCTIONS
81