YASKAWA S-7 Series, Command Manual

Page: 125 / 191

4.3 Read Alarm or Warning Subcommand (ALM_RD: 05h)
4-4
4.3 Read Alarm or Warning Subcommand (ALM_RD: 05h)
Data Format
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.
Command Parameters
The details of ALM_RD_MOD are described below.
Σ
-7-Series alarm codes are two bytes in length. The data structure is given below.
Phases in which the
Command can be Executed
2, 3
Command Clas-
sification
Common
command
Asynchronous
command
Processing Time
Refer to the
specifications of
ALM_RD_MOD
Byte
ALM_RD
Description
Command Response
32 05h 05h
•
The ALM_RD subcommand reads the current alarm or
warning state as an alarm or warning code.
•
Confirm the completion of the subcommand execution
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)
33
SUB_CTRL SUB_STAT 34
35
36
ALM_RD_MOD ALM_RD_MOD
37
38
ALM_INDEX ALM_INDEX
39
40
Reserved ALM_DATA
41
42
43
44
45
46
47
ALM_RD_MOD Description Processing Time
0
Current alarm or warning state
Maximum of 4 records (from byte 40 to byte 47) Within
communication cycle
1
Alarm occurrence status history
(Warnings are not retained in the history.)
Maximum of 4 records (from byte 40 to byte 47)
Within 60 ms
Bits 12 to 15 Bits 0 to 11
0 Alarm Code
Example for A.94B 0h 94Bh