Comtech EF Data M&C Software - Manual (Page 31)

M&C Software Revision 3
Troubleshooting MN/M_C17.IOM
MN/M_C17.IOM 3–3
3.3 Communication with Redundant Systems
All redundant systems serviced by the program use a branch approach in their system
communications (i.e., the user communicates to the system through a single point, the
redundant controller, and the single point then provides communication branches to the
remaining equipment, the two RFTs). This architecture mandates that the program must
first be able to communicate to the redundant controller before it can provide the desired
monitor and control functions for the two RFTs.
Therefore, when dealing with redundant system communication link problems, the link
with the RSU must first be established.
After the communication link between the host and RSU has been established, use the
appropriate “Acquire Comm” function(s) to establish the links between the RSU and two
RFTs.
3.3.1 3.3.1 Addressing
The following are the factory default addresses:
• RSU-503 is set to address 1.
• RFT A is set to address 2.
• RFT B is set to address 3.
The proper M&C cable hook-up is critical:
• RFT A must be connected to the RSU Port A.
• RFT B must be connected to the RSU Port B.
CAUTION
If these connections are reversed, no communications will take
place.