Eaton Electrical EZ204-DP user manual Operating hours counters O1 O4 Telegram structure

Read/write function block data

Operating hours counters: O1 – O4

Telegram structure

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	–	C01
2	Type		92	92
3	Instance2		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).

Table 30: Operand overview

Index	Operand		Read	Write
(hex)
00	Parameters J Table 31		×
01	Control byte J Table 32		×
02	Actual value	S12	×	c1
03	Counter setpoint 2	S22	×	c1

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.

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