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9 Appendix
9.1 Data image of the technology modules
164
XI/ON: XNE-GWBR-2ETH-MB 10/2011 MN05002008Z-EN www.eaton.com
Table 78:
Process output
data - counter
mode of
XN-1CNT-
24VDC Control bit Value, meaning
A
Unlike the
physical digital
output DO1,
output DO2 is
only a data value
that is indicated
with the data bit
STS_DO2 of the
process
input.
MODE_DO2 Only valid if LOAD_DO_PARAM: "0"
→
"1".
The virtual
A
output DO2 can show the status of the data bit
SET_DO2 or comparison results if CTRL_DO2 = 1.
MODE_DO2 defines which function DO2 is to accept:
– 00: The output DO2 shows the status of the control bit
SET_DO2.
This must be released with CTRL_DO2 = 1.
– 01:Output DO2 indicates:
Counter status ≧ reference value 2
– 10:Output DO2 indicates:
Counter status ≦ reference value 2
– 11:Output DO2 indicates:
Counter status = reference value 2
A pulse is generated for indicating equal values. The pulse dura-
tion is defined by byte 2 of this process output.
MODE_DO1 Only valid if LOAD_DO_PARAM: "0"
→
"1".
The physical output DO1 can show the status of the data bit
SET_DO1 or comparison results if CTRL_DO1 = 1.
MODE_DO1 defines which function DO1 is to accept:
– 00: The output DO1 shows the status of the control bit
SET_DO1. This must be released with CTRL_DO1 = 1.
– 01: Output DO1 indicates:
Counter status ≧ reference value 1
– 10: Output DO1 indicates:
Counter status ≦ reference value 1
– 11: Output DO1 indicates:
Counter status = reference value 1
A pulse is generated for indicating equal values. The pulse dura-
tion is defined by byte 2 of this process output.
Hysteresis value (0 to 255)
The reference value 1/2 can be assigned a hysteresis value in order
to generate a response at DO1/DO2 with hysteresis. This will
prevent the excessive on and off switching of DO1/DO2 if the
count value fluctuates too quickly around the reference value.
Pulse duration (0 to 255) unit: ms
If the DO1/DO2 outputs are set to indicate counter status
= reference value 1/2, a longer pulse is sometimes required to
indicate equal values.
EXTF_ ACK Error acknowledgement
The error bits must be acknowledged with the control bit
EXTF_ACK after the cause of the fault has been rectified. This
control bit must then be reset again. Any new error messages are
not set while the EXTF_ACK control bit is set!