WAGO-I/O-SYSTEM 750
Process Image
25
750-1425 8DI PTC
Manual
Version 1.1.0
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5
Process Image
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The I/O module provides the fieldbus coupler/controller with 2 bytes for the input
and output process image via one logical channel.
The signal status of PTC inputs 1T … 8T (DI1 … DI8) is transmitted to the
fieldbus coupler/controller via input data byte D0.
The fault condition is transmitted via input data byte D1.
The diagnostic status is transmitted to the I/O module via output data byte D1.
Output data byte D0 is reserved and always has the value “0”.
Table 15: Input byte D0 – signal status
Input byte D0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DI 8
DI 7
DI 6
DI 5
DI 4
DI 3
DI 2
DI 1
DI 1
Signal status PTC 1 – channel 1
DI 2
Signal status PTC 2 – channel 2
DI 3
Signal status PTC 3 – channel 3
DI 4
Signal status PTC 4 – channel 4
DI 5
Signal status PTC 5 – channel 5
DI 6
Signal status PTC 6 – channel 6
DI 7
Signal status PTC 7 – channel 7
DI 8
Signal status PTC 8 – channel 8
Table 16: Input byte D1 – fault condition
Input byte D1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DB/KS 8 DB/KS 7 DB/KS 6 DB/KS 5 DB/KS 4 DB/KS 3 DB/KS 2 DB/KS 1
DB/KS 1
Wire break/short circuit PTC 1 – channel 1
DB/KS 2
Wire break/short circuit PTC 2 – channel 2
DB/KS 3
Wire break/short circuit PTC 3 – channel 3
DB/KS 4
Wire break/short circuit PTC 4 – channel 4
DB/KS 5
Wire break/short circuit PTC 5 – channel 5
DB/KS 6
Wire break/short circuit PTC 6 – channel 6
DB/KS 7
Wire break/short circuit PTC 7 – channel 7
DB/KS 8
Wire break/short circuit PTC 8 – channel 8
Table 17: Bit combination
Byte 1 (0 … 7)
Wire break/short circuit
Byte 0 (0 … 7)
Signal status DI
Explanation
0
0
Overtemperature
0
1
Temperature OK
1
0
Wire break/short circuit
1
1
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