Specifications

86 209351 REV B Operations Manual, Redundant System Controllers
7.4 Examples
This section contains several examples of serial data exchange between a host
computer and an RCP2-1200 1:2 Redundant Controller. All byte values are given in
hexadecimal format. The following controller and system switch positions are used
throughout all examples.
• RCP2-1200 Network Address = 0
• Host Computer Network Address = 10
• Request ID = 0x6F
Amplifier Status
Amplifier #1= OK
Amplifier #2= Faulted
Amplifier #3= OK
Power Supply Status
Power Supply #1=OK
Power Supply #2=OK
Auxiliary Fault Inputs = Faulted
RF Switch Status
Switch #1 Position= Position 1
Switch #2 Position = Undetermined or Faulted
7.4.1 Example 1
The host computer requests the RCP2-1200 system conditions. The RCP2-1200
detects no errors in the request frame and issues a response. The PC request string is
listed below.
Byte
Position
Byte
Value
(Hex)
Description
1 AA Frame Sync Byte 1
2 55 Frame Sync Byte 2
3 0 Destination Address of RCP unit
4 A Source address of Request originating PC Host
5 0 Protocol Version Compatibility Field must always be 0
6 6F Request ID byte is set by originator, will be echoed back by respondent
7 1 Command field for “Get” type request
8 3 “System Conditions” tag indicates which data from respondent required in
response frame
9 1 Data Address field indicates the beginning data address inside of the “System
Conditions” data set to 1 (first element)
10 C Data Length field indicates how many data bytes of the “System conditions”
requested from RCP2 (12 is all available data of “System Conditions” type)
11 8A Arithmetic checksum of bytes number 3 through 10