Read/write function block data
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MN05013001E
79
Operating hours counters: O1 – O4
Telegram structure
Table 30: Operand overview
Byte
Meaning
Value (hex), sent by
Master
Slave
0
Toggle byte
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1
Command:
Read
89
–
Write
8D
–
Response:
Read successful
–
C2
Write successful
–
C1
Command rejected
–
C0
1
2
Type
92
92
3
Instance
2
00 – 03
00 – 03
4
Index
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Table 30
5 – 8
Data 1 – 4
depending on index,
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Table 31
1) Possible causes
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2) EZ provides 4 operating hours counters O1 to O4. These can be
addressed using the instance (0 – 3).
Index
(hex)
Operand
Read
Write
00
Parameters
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Table 31
×
01
Control byte
J
Table 32
×
02
Actual value
S1
2
×
c
1
03
Counter setpoint 2
S2
2
×
c
1
1) The value can only be written if it is assigned to a constant in the
program.
2) A 32-bit value is transferred in data bytes Data 1 – Data 4. It should be
remembered that the Data 1 is the low byte and Data 4 the high byte.