Siemens TX-I/O TXM1.8U - Page 38

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Siemens TX-I/O™ Module system – Functions and operation CM110561en_08
Building Technologies Digital output functions 2018-10-25
• The multistate process value is mapped so that the mapping table specifies one or
more outputs to be driven.
• It is possible to have several active outputs, but only in a fixed combination.
• Examples: Enabling additional electrical heating or burner stages
MOValue
Stage
Active I/O points
0
0
None
1
1
n
2
2
n, n+1
3
3
n, n+1, n+2
4
4
n, n+1, n+2, n+3
5
5
n, n+1, n+2, n+3, n+4
6
6
n, n+1, n+2, n+3, n+4, n+5
• The multistate process value is mapped so that the mapping table specifies one or
more outputs to be driven.
• It is possible to have several active outputs.
• Examples: Enabling additional electrical heating or burner stages
MOValue
Stage
Active I/O points
n
n+1
n+2
n+3
n+4
n+5
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
2
2
0
1
0
0
0
0
3
3
1
1
0
0
0
0
4
4
0
0
1
0
0
0
:
:
63
63
1
1
1
1
1
1
In the case of bus failure, with DC 24 V module supply available, the following backup
states van be parameterized:
– No (Inactive) (= default)
– Value (Active, Inactive)
– Keep Same value as before the bus failure
Parameterization can be done during runtime.
• The I/O status LEDs indicate the activity of the relays
• In the case of an error the module status LED and all the I/O status LEDs assigned
to the function flash.
Up-down mapping
Binary mapping
Parameterization
Display