Omron SJDE-ANA-OY - Read Alarm or Warning (ALM_RD: 05 H)

4.2 Main Commands
65
4.2.7 Read Alarm or Warning (ALM_RD: 05H)
* Alarm occurrence history is saved in non-volatile memory, and will not be lost if power goes OFF.
 Details of ALM_RD_MOD
Byte ALM_RD Description
Command Response
1 05H 05H
Processing clas-
sifications
Data communi-
cations com-
mand group
Synchronization
classifications
Asynchronous
2 − ALARM
Processing time Refer to
 Details of
ALM_RD_MOD.
Subcommand Cannot be used
3 STATUS • Reads the following alarm or warning status.
-Current alarm/warning status
-Alarm status history* (warning history is not preserved.)
• The ALM_RD_MOD specifications are shown in the following table.
• Alarm and warning codes are set in ALM_DATA from byte 6 in their order
of detection, and 0 is set in the bytes that are blank in the table. Accord-
ingly, the data in byte 6 is for the latest alarm or warning codes.
• A warning will occur and the command will be ignored in the following
cases.
-If ALM_RD_MOD is not within range: Data setting warning 2 (A.94B)
4
5 ALM_RD_
MOD
ALM_RD_
MOD
6 − ALM_DATA
7
8
9
10
11
12
13
14
15
16 WDT RWDT
ALM_RD_MOD Description Processing Time
0 Read current alarm/warning status
10 items max. (sixth to fifteenth byte)
Within communica-
tion cycle
1 Read alarm status history
10 items max. (sixth to fifteenth byte)
(Warning history is not preserved.)
Within 60 ms
2 Gets the detailed information of current alarm or warning one by one.
Set the occurrence order from 0 (the latest) to 9 for the alarm index.
Within 12 ms
3 Gets the detailed information of alarm status history one by one.
Set the occurrence order from 0 (the latest) to 9 for the alarm index.
Byte
6
Alarm index
0
Command
Alarm index
Alarm code
Response
7-8
Byte
6
Alarm index
0
Command
Alarm index
Alarm code
Response
7-8
TOEP_C710806_03A_1_0.book Seite 65 Montag, 2. Juli 2007 3:55 15