Functions of the IM 178-4
6-11
IM 178-4
C79000-G7076-C178-01
Table 6-4
User Data Area of the Inputs
Byte
Data Format
Meaning
Name or Value
Bit
Channel 1
12
0
REF1_Q
Acknowledgment for actual reference
value detection with 1I1 and zero mark
BOOL
1
REF0_Q
Acknowledgment for actual reference
value detection with 1I0
BOOL
2
SYN_Q
Acknowledgment for synchronization
BOOL
3
0
reserved
4
+/–
Direction of movement (0=negative di-
rection, 1=positive direction)
BOOL
5
SYNC
Actual value synchronized (only valid
after setting SYN)
BOOL
6
PARA
Channel parameter assignment error–
free
BOOL
7
–
irrelevant
13
0
1I0
Digital input 0
BOOL
1
1I1
Digital input 1
BOOL
2
1I2
Digital input 2
BOOL
3
0
reserved
4
EXTF0
Sensor signal cable error 0
BOOL
5
EXTF1
Sensor error
BOOL
6
EXTF2
Zero mark error
BOOL
7
0
reserved
14
0000
reserved
15
0000
H
reserved
16
17
Actual position value channel 1
DINT
18
Actual position value channel 1
DINT
19
20
21
Actual reference value channel 1
DINT
22
Actual reference value channel 1
DINT
23