Checking Warning Output (Process Alarm) - Mitsubishi Electric NZ2FTGN User Manual

Checking warning output (Process alarm)

Check whether Process alarm has occurred from the I/O module corresponding to the warning output, and read the Process
alarm data of the content.
The I/O modules that support the alarm output and their details are as follows.
• NZ2FTS-60RD4: Page 504 Warning output (Process alarm)
• NZ2FTS-60TD4: Page 516 Warning output (Process alarm)
• NZ2FTS-D62P2: Page 535 Warning output (Process alarm)
Process alarm cannot be checked from the Web server.
When Process alarm is detected from the I/O module, Process Alarm event notify (b1), which indicates if an unacknowledged
Process alarm occurred in Status word1, becomes 1. ( Page 166 Status word1)
How to check Process alarm
Use the RDMSG instruction to read Process alarm data of the I/O module that is detecting Process alarm.
■Reading procedure
1.
The NZ2FT-BT is sending Status word1 by cyclic transmission.
2.
When an error occurs in the I/O module, Status word1 whose Process Alarm event notify (b1) became 1 is sent, and the
master station detects Process alarm.
3.
When Process Alarm event notify (b1) is 1, the master station uses RDMSG Request of the RDMSG instruction to read
Process alarm.
4.
The NZ2FT-BT sends RDMSG Response (response data) for RDMSG Request to the master station.
5.
Status word1 whose Process Alarm event notify (b1) became 0 is sent by cyclic transmission.
If an error occurs in multiple slots, repeat procedures 2 to 4. When all the responses of the slot where an error has occurred
are completed, Process Alarm event notify (b1) of Status word1 becomes 0.
■RDMSG instruction format
The RDMSG instruction format refers to the format of the setting data of dedicated instruction G.RDMSG or GP.RDMSG. For
details, refer to the following.
• When the master module is the RJ61BT11: Message transmission to the remote device station ( MELSEC iQ-R
Programming Manual (Module Dedicated Instruction))
• When the master module is the QJ61BT11N: G(P).RDMSG ( MELSEC-Q CC-Link System Master/Local Module User's
Manual)
Operand +0
(U) Start I/O number of the
module: 0000H
(s1) Completion status:
0000H
(s2) Command No.: 0820H
RDMSG Request
*3
(d1) Command No.: 0820H
RDMSG Response
*3
(d2) Instruction completion: 0
EN Execution flag: 1
*3
ENO Execution result: 0
*1 The slot number where the error occurred is stored. If there is no unacknowledged Process alarm, FFH is stored.
*2 For the data structure, refer to Process alarm data on each I/O module page.
*3 Since it is stored by the NZ2FT-BT, store 0 when sending RDMSG Request.
8 NZ2FT-BT
140
8.4 Functions
+1 +2
 
Station number: 0001H Send data size: 000AH
Msg ID: Len: 0AH Res: FFH
02H
Msg ID: Len: 0AH Res: FFH
02H

Completed with an error:
0
 
 
+3

Receivable data size:
000AH
Slot: FFH Send data (4 bytes): All 0
*1
Slot: Receive data (4 bytes): Process Alarm
When there is no unacknowledged Process alarm:
All 0



+4

Receive data size:
0000H
*2


