How To Switch Mode From Target Device - Mitsubishi Electric MELSEC iQ-R Series User Manual

19.5

How to Switch Mode from Target Device

This section shows how to switch the C24 mode from the target device.
Mode switching procedure
The procedures for switching C24 mode from the target device.
Mode switching
*1
command
Target device
message
CPU module
Mode switching in progress
CH ERR. communication error
Module READY
Parameter setting error, mode switching error
storage area (Un\G515)
Buffer memory special applications area
Data communications initialization setting area
Un\G147 to 292/307 to 452
*1 Inform in advance all the connected device that data communications cannot be performed due to mode switching.
*2 When 'CH Error occurrence' (XE, XF) turns ON, check the error contents and take the corresponding actions. (Page 473 Error
Code List)
 Checking of mode switching designation contents for buffer memory mode switching area and writing of mode switching designation
contents within the range that can be designated
 Re-execution of mode switching
*3 When mode switching is performed from the target device, perform the read/write operation from/to the special applications area on the
buffer memory shown below from the CPU module after mode switching is completed.
 'Parameter setting error, mode switching error status' (Un\G515)
 Initial setting areas for data communication (Un\G147 to 289/307 to 449) (Page 498 Buffer memory list)
*4 After confirming that mode switching was completed normally, inform all the connected devices that data communications are possible,
and restart data communications.
To check C24 mode (communication protocol, transmission specifications) after mode switching, read the
buffer memory (Un\G594 to 595/610 to 611). (Read the buffer memory with the MC protocol buffer memory
read function when checking by the target device.) ( MELSEC Communication Protocol Reference
Manual)
*For the message format, refer to the MELSEC Communication Protocol Reference Manual.
Mode switching
response message
X6/XD
XE/XF
X1E
Data
communications
possible
*2
*3
FROM
(Only when normal)
*3
TO
Default value modification
(Performed only when necessary)
Data communications impossible
19 SWITCHING THE MODE AFTER STARTING
19.5 How to Switch Mode from Target Device
*4
Data communications possible
385
19