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

4.3 Read Alarm or Warning Subcommand (ALM_RD: 05h)

4.3

Read Alarm or Warning Subcommand (ALM_RD: 05h)

Data Format
Phases in which the
Command can be Executed
Processing Time
Byte
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
Command Parameters
The details of ALM_RD_MOD are described below.
ALM_RD_MOD
Σ-7-Series alarm codes are two bytes in length. The data structure is given below.
Example for A.94B
4-4
Refer to the
specifications of
ALM_RD_MOD
ALM_RD
Command
05h
SUB_CTRL
ALM_RD_MOD ALM_RD_MOD
ALM_INDEX ALM_INDEX
Reserved
Note: 1. In ALM_DATA, each two bytes provide the information for one alarm.
2. The most recent alarms come first in the history data.
3. Normal status is indicated by 0000h.
Current alarm or warning state
0
Maximum of 4 records (from byte 40 to byte 47)
Alarm occurrence status history
1 (Warnings are not retained in the history.)
Maximum of 4 records (from byte 40 to byte 47)
2, 3
Command Clas-
sification
Response
• The ALM_RD subcommand reads the current alarm or
05h
warning state as an alarm or warning code.
• Confirm the completion of the subcommand execution
SUB_STAT
by checking that RSUBCMD = ALM_RD (= 05h) and
SUB_STAT.SBCMDRDY = 1.
• ALM_INDEX is not used. Its setting is ignored.
In the following cases, an alarm will occur and the sub-
command will not be executed.
• When the ALM_RD_MOD data is invalid:
SUBCMD_ALM = 9h (A.94B)
ALM_DATA
Description
Bits 12 to 15
0
0h
Common Asynchronous
command
Description
Processing Time
Within
communication cycle
Within 60 ms
Bits 0 to 11
Alarm Code
94Bh
command