LINK Systems OmniLink II Press Automation Control - Manual (Page 32)

August 30, 2002 Manual Version 1.0 2.23
in separate documents sent in addition to this manual when these options are purchased with your
system.
Section 2.6 Wiring the Parallel Port for Messages from Auxiliary Equipment
(Optional)
The OmniLink II Press Automation Control makes provision to wire inputs to its parallel port on the
back of the operator terminal from auxiliary equipment intelligent controllers so that diagnostic
messages from auxiliary equipment can be displayed on the brake monitor screen of the operator
terminal. Seven isolated signal inputs and an isolated ground constitute the parallel port, which can be
wired to provide up to 128 message codes. The OmniLink operator terminal allows entry of an alpha-
numeric message of up to 40 characters long for each message code input to the parallel port. This is a
useful feature when the user wants a simpler solution to diagnostics than having to deal with
programming serial port communications between two different intelligent systems. Wire as shown in
Figure 2.21.
The seven outputs on the PLC output card can be programmed to output the binary numbers 0000000 –
1111111 (decimal numbers 0-127) as diagnostic message codes. Of course, many times far fewer
message codes will be needed, and only the needed number of messages will be programmed.
Figure 2.21 Seven PLC Outputs Used to Create Message Codes 0000000- 1111111 (0-127)
Once the parallel port inputs are wired to receive message codes as in Figure 2.21, the configuration
screens for Names and Messages on the OmniLink II operator terminal allows entry of alpha-numeric
auxiliary equipment messages on the operator terminal brake monitor screen. Auxiliary equipment
message entry is described in Section 4.3.
GN
1 2 3 4 5 6 7 8
PLC OUTPUT
CARD ON
AUXILIARY
EQUIPMENT
CONTROLLER
USE SEVEN
SOURCING
OUTPUTS
+(12-24VDC)
GND
PARALLEL PORT TERMINAL