Read Alarm Or Warning Command (Alm_Rd: 05H) - YASKAWA S-7 Series Command Manual

3.1.4

Read Alarm or Warning Command (ALM_RD: 05h)

Data Format
Phases in which the
Command can be Executed
Processing Time
Byte
Command
0
1
2
CMD_CTRL
3
4
ALM_RD_MOD
5
6
ALM_INDEX
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
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.
2, 3
Refer to the spec-
ifications of
ALM_RD_MOD
ALM_RD
Response
05h 05h
WDT RWDT
CMD_STAT
ALM_RD_MOD
ALM_INDEX
Reserved ALM_DATA

3.1.4 Read Alarm or Warning Command (ALM_RD: 05h)

Command
Common
Classification command
Subcommand
Description
• 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)
3.1 Common Commands
Asynchronous
command
Cannot be used
3
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