Eaton Electrical PROFIBUS-DP EZ204-DP - Manual (Page 83)

Read/write function block data
For more information visit: www.EatonElectrical.com MN05013001E 79
Operating hours counters: O1 – O4
Telegram structure
Table 30: Operand overview
Byte Meaning Value (hex), sent by
Master Slave
0 Toggle byte J page 44
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 J Table 30
5 – 8 Data 1 – 4 depending on index, J Table 31
1) Possible causes J page 91
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 J 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.