C.5.3 address delimiter, C.5.4 instruction code – Mocomtech CRS-300 User Manual
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CRS-300 1:10 Redundancy Switch
Revision 16
Remote Control
MN/CRS300.IOM
C–4
modem protocol and the installed options. Consult the appropriate modem Installation and
Operation Manual for further information.
Note that, regardless of the Switch COMs being set up for either EIA-232 or EIA-485 mode, the
internal link between the Switch and the modems is fixed:
IMPORTANT
For CDM-600L or CDM-570L modems:
RS-232, 9600 baud, 8-N-1, address 0
For CDM-QxL modems:
RS-485, 9600 baud, 8-N-1, correct address
(see Appendix B. ADDRESSING SCHEME INFORMATION)
For SLM-5650 modems:
TTL Switch, 9600 baud, 8-N-, address N/A
Note that, for the purpose of clarity, the examples here refer to the old Recommended Standard
(RS) designation rather than the new designation of the Electronic Industries Association (EIA).
The Controller sends a packet with the address of a Target - the destination of the packet. When
the Target responds, the address used is the same address, to indicate to the Controller the source
of the packet. The Controller does not have its own address.
The Comtech SatMac application software (Version 3.6 or higher) can monitor and control a
CRS-300 redundancy system. The address scheme details are shown in Appendix B.
ADDRESSING SCHEME INFORMATION.
There also are address restrictions for distant-end modems (being accessed by EDMAC) and
Comtech transceivers, connected either locally or at the distant-end of a link. See Appendix B.
ADDRESSING SCHEME INFORMATION for detailed addressing information and diagrams.
C.5.3 Address Delimiter
This is the “forward slash” character '/' (ASCII code 47).
C.5.4 Instruction Code
This is a three-character alphabetic sequence that identifies the subject of the message. Wherever
possible, the instruction codes have been chosen to have some significance. For example, BKH is
for BacKup Hold-off time; SID is for Switch ID, etc. This aids in the readability of the message if
seen in its raw ASCII form. Only upper case alphabetic characters may be used (A-Z, ASCII
codes 65-90).