3.1 Common Commands
3.1.5 Clear Alarm or Warning Command (ALM_CLR: 06h)
3
Main Command
s
3-15
3.1.5
Clear Alarm or Warning Command (ALM_CLR: 06h)
Data Format
Command Parameters
The details of ALM_CLR_MOD are described below.
Phases in which the
Command can be Executed
2, 3
Command
Classification
Common
command
Asynchronous
command
Processing Time
Refer to the
specifications of
ALM_CLR_MOD.
Subcommand
Cannot be used
Byte
ALM_CLR
Description
Command
Response
0
06h
06h
•
The ALM_CLR command clears the alarm or warning
state. It changes the state of a slave station, but does
not eliminate the cause of the alarm or warning. ALM_-
CLR should be used to clear the state after the cause of
the alarm or warning has been eliminated.
•
When a communication error (reception error) or syn-
chronous communication error (watchdog data error)
occurs during synchronous communication, synchro-
nous communication must be recovered by using the
SYNC_SET command after the ALM_CLR command
has been executed.
•
Confirm the completion of the command execution by
checking that RCMD = ALM_CLR (= 06h) and
CMD_STAT.CMDRDY = 1, and also checking the setting
for ALM_CLR_MOD.
In the following cases, an alarm will occur and the com-
mand will not be executed.
•
When the ALM_CLR_MOD data is invalid:
CMD_ALM = 9h (A.94B)
•
While editing using SigmaWin or digital operator:
CMD_ALM = Ah (A.95A)
Use this command with CMD_CTRL.ALM_CLR set to "0."
1
WDT
RWDT
2
CMD_CTRL
CMD_STAT
3
4
ALM_CLR_MOD
ALM_CLR_MOD
5
6
Reserved
Reserved
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
ALM_CLR_MOD
Description
Processing Time
0
Clearance of the current alarm or warning state
Within 200 ms
1
Clearance of the alarm history
Within 2 s
