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

Checking warning output (Process alarm)

Checks whether Process alarm has occurred from the I/O module corresponding to the warning output, and reads 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.
How to check Process alarm
Use the SLMP command to read Process alarm data of the I/O module that is detecting Process alarm.
■Reading procedure
1.
Whether Process alarm that has not been read has occurred is indicated by Process Alarm event notify (b1) of Status
word1. Status word1 is transferred to the master station CPU module device by cyclic transmission. ( Page 128
Status word1)
2.
When Process alarm occurs in the I/O module, Process Alarm event notify (b1) becomes 1 in the NZ2FT-GN and the
master station.
3.
The master station sends the read request of Process alarm data to the NZ2FT-GN by a program that uses the SLMP
command Device Read.
4.
The NZ2FT-GN sends response data to the read request of Process alarm data.
5.
Process Alarm event notify (b1) of the NZ2FT-GN becomes 0, and Status word1 is sent to the master station by cyclic
transmission.
If Process alarm has occurred in multiple slots of the I/O module, repeat procedures 2 to 4. When all the responses of the slot
where Process alarm has occurred are completed, Process Alarm event notify (b1) of Status word1 becomes 0.
■SLMP message format
Process alarm data is read by using the SLMP command Device Read. Use the module access device and set it to perform
extension specification for the binary code. For details, refer to the following.
 SLMP Reference Manual
Use 45239 as the NZ2FT-GN port number to be used for SLMP commands.
• Process alarm read request data
SLMP Command Subcommand
Request
Device 0401H 0080H
Read
• Process alarm read response data
SLMP Response Alarm
type
Device Read 02H
*1 If there is no unacknowledged Process alarm, FFH is stored.
*2 If there is no unacknowledged Process alarm, 0 is stored.
If the second Process alarm is detected on the same channel of the same I/O module before reading Process
alarm data, the second Process alarm data will not be stored correctly.
If Process alarm is detected, read Process alarm data.
Reserved Start
device
number
0000H 000002H
Slot number
The slot number where the error occurred (I/O module mounting position) is
*1
stored.
Device code Reserved Extension
specification
00ABH 0000H 00FFH
Reserved Number of
device
points
F8H 0008H
Res Data
*2
FFH 4 bytes (Process alarm data)
7 NZ2FT-GN
7.4 Functions
7
105