Revision 25 of DOCU225, © Copyright
• The third-party WITS device is set up to continuously send a handshaking packet
to the EDR every 30 seconds. Pason recommends continuously sending a TVD
WITS packet configured as shown in Figure 7. The EDR is coded to recognize
and use this specific packet for maintaining WITS communication, but can also
receive TVD WITS packets with actual values from other WITS devices at the
same time. The EDR is capable of receiving this handshaking packet from
multiple WITS devices simultaneously.
Be sure to include all of the carriage return and line feed characters shown
below.
&&<cr><lf>
0111-9999<cr><lf>
!!<cr><lf>
Figure 7: Recommended WITS handshaking packet
4.3 Setting up the EDR Comm Port
Setting up an EDR Comm Port for WITS Connections via a DHC, Workstation,
SideKick, or UJB
If you connected the WITS device to the EDR via a DHC, Workstation, SideKick, or UJB,
the device doesn’t appear in the EDR Comm Port list. In these cases, you do not need to
set up a comm port. To determine if WITS is working in these setups, check the WITS
monitor, check the EDR for WITS traces sent by the third-party device, or check the
third-party device for WITS values sent by the EDR.
Important:
As a best practice, Pason recommends connecting WITS devices before setting up comm ports
and configuring WITS in the EDR.
Setting up the EDR Comm Port for WITS Connections via Toolpush Connection
Box or Network Panel
If you connected the WITS device to one of these panels with a COMM022, the EDR
assigns the device a comm port. The EDR also enables you to select a transmission
speed (in bits per second) for connected comm ports, but Pason strongly recommends
using the default Auto setting.
To set up the EDR comm port, you need to determine the assigned comm port and then
configure it.
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