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IC-KP2-2HB17-2V1D
Commands
Sepa-
rated
mode
7.8.7
Heartbeat and ident status
If you select instance 112d and 162d of the assembly object, the size of the output field is 0
bytes and the size of the input field is 10 bytes. The status and the reply counter are included.
Byte status
00
01
02
03
04
05
06
07
08
09
The advantage of this procedure is that only a few bytes are transferred via the bus.
Identification commands are transferred to the control unit as explicit commands. A new ident
response can be read as soon as the value on the reply counter changes.
7.8.8
Data hold time
The data hold time indicates how long the responses from the control unit remain in the input
field. Set the data hold time via the boot-up object or on the device website. Select values
between 0 and 2.55 seconds in 10 ms increments. The default value is 100 ms. The PLC must
read the response before a new response is written so that no responses are lost. Ensure that
the data hold time is greater than the maximum cycle time of the whole system (including data
storage to the PLC). Do not select a data hold time with a value excessive to requirements
because
the reaction time of the device will increase if several responses arrive in quick
■
succession.
The maximum possible number of response telegrams per time unit decreases when the
■
data hold time is increased. A memory overflow may occur. The PWR/ERR LED flashes
green.
Implicit data
exchange
Output
Input
instance
instance
104d
154d
105d
155d
106d
156d
107d
157d
108d
158d
109d
159d
110d
160d
111d
161d
112d
162d
Description
Status of the IDENTControl
Reply counter of the IDENTControl
Status of channel 1
Reply counter from channel 1
Status of channel 2
Reply counter from channel 2
Reserved
Reserved
Reserved
Reserved
Explicit access
Instances from input/output commands
1
2
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
5
6
(conf.)
x
x
x
x
x
x
x
x
x
x
x
x
x
43
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