Delta RMC151 - Manual (Page 418)

RMC70/150 and RMCTools User Manual
Pin # RS-232 Function
1 DCD- Not used by RMC70
2 RxD - Receive Data
3 TxD - Transmit Data
4 DTR - Not used by RMC70
5 GND - Common
6 DSR - Not used by Monitor Port
7 RTS - Not used by Monitor Port
8 CTS - Not used by Monitor Port
9 Not Connected
Wiring
Note:
The DB9 shell is connected to the RMC70 Case.
For more details, see the RS-232 Wiring for the RMC70 topic.
6.4. Indirect Data Map
The Indirect Data Map maps data registers from anywhere in the RMC to certain contiguous
registers. The intent of this structure is to allow packing of otherwise discontiguous data
together for efficient I/O and messaging communications.
For example, perhaps you wish to read and write to 5 registers in the RMC75E via the Allen-
Bradley CSP protocol (DF1 over Ethernet). These registers may have addresses F8:0, F8:8,
F9:0, F9:8, and F56:0. Reading these would require several reads, and would not be very
efficient. By using the Indirect Data Map, you can assign these registers to F18:0 to F18:4.
Now only one read of 5 registers is required, which is much more efficient.
398 Delta Computer Systems, Inc.