YASKAWA S-7 Series, Command Manual

Page: 79 / 191

3.1 Common Commands
3.1.4 Read Alarm or Warning Command (ALM_RD: 05h)
3
Main Command
s
3-13
3.1.4 Read Alarm or Warning Command (ALM_RD: 05h)
Data Format
Note: 1. ALM_DATA specifies an alarm using 2 bytes.
2. The alarm history arranges alarms in the order of occurrence starting from the latest alarm.
3. 0000h is set in the normal state.
Phases in which the
Command can be Executed
2, 3
Command
Classification
Common
command
Asynchronous
command
Processing Time
Refer to the spec-
ifications of
ALM_RD_MOD
Subcommand Cannot be used
Byte
ALM_RD
Description
Command Response
0 05h 05h
•
The ALM_RD command reads the alarm or warning
state.
•
The current alarm or warning state is read to ALM_-
DATA.
•
Confirm the completion of the command execution by
checking that RCMD = ALM_RD (= 05h) and
CMD_STAT.CMDRDY = 1, and also checking the setting
for ALM_RD_MOD.
•
ALM_INDEX is not used. Its setting is ignored.
In the following cases, an alarm will occur. Do not read
ALM_DATA in the response in these cases because the
ALM_DATA value will be indefinite.
•
When the ALM_RD_MOD data is invalid:
CMD_ALM = 9h (A.94B)
1 WDT RWDT
2
CMD_CTRL CMD_STAT
3
4
ALM_RD_MOD ALM_RD_MOD
5
6
ALM_INDEX ALM_INDEX
7
8
Reserved ALM_DATA
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31