2
0
2
0
-0
3
16
Commissioning
4.2
Connecting the WCS Read Head
If you connect several WCS read heads to one interface module, the WCS read heads must
have different addresses. This will allow the programmable logic controller to allocate the data
to the correct WCS read heads. If you connect only one WCS read head to an interface mod-
ule, this WCS read head always receives the address 0. You can connect up to WCS read
heads to an interface module via an RS-485 cable. Each WCS read head is supplied with the
default address of 0. Details of how to change the address of the WCS read head can be found
in the configuration instructions for the WCS read head.
Setting the Number of Connected WCS Read Heads
Set the number of connected WCS read heads with the rotary switch S4 in accordance with the
table "Rotary switch S4."
Rotary switch S4
Rotary Coding Switch S5
The Extended protocol (traverse distance 629.146 meters) is set on the interface module using
rotary switch S5. The WCS read heads are addressed via a modified prompt bit. A total of one
byte more is transferred in the response telegram of the WCS Extended protocol. For more
information on the data format, refer to the WCS electrical manual (DOCT-5959).
Rotary switch S5 = switch position 0 for WCS standard (read head WCSxB-LS221*)
Rotary switch S5 = switch position 1 for WCS Extended 629.146 meters (read head WCS3B-
LS*E*)
Other states/switch positions are not permitted.
WCS Extended enables up to four RS-485 read heads to be connected to an interface module.
WCS read head connection pin
Terminal on interface module
WCS2B
WCS3B
2
1
X2-1
4
2
X1-4
1
4
X1-5
3
3
X2-2
Table 4.1
Connection of WCS read heads
Switch position
S4
Number of WCS read heads
Read head
address
1
1 WCS read head
0
2
2 WCS read heads
0.1
3
3 WCS read heads
0, 1, 2
4
4 WCS read heads
0, 1, 2, 3
5
1 WCS read head with velocity output
0
6
2 WCS read heads with velocity output
0, 1
7
3 WCS read heads with velocity output
0, 1, 2
8
4 WCS read heads with velocity output
0, 1, 2, 3
Table 4.2
Position of rotary switch S4 for setting the number of WCS read heads
Example
You have connected three read heads to the interface module and want to use the velocity
output. Set the rotary switch S4 to switch position 7 and set the addresses 0,1,2 on the three
read heads.
