CHIEF PXR - Manual (Page 24)

PXR Installation Instructions
24
PROGRAMMING VIA RS485
Setting PXR Address
NOTE: If multiple PXR’s or Chief automated products will be
controlled in the same area AND need to have
UNIQUE command codes, the PXR or other Chief
automated product will need to have its address
changed.
1. Determine what address is not used by another Chief
automated product.
2. Using the DIP switches on the I/O interface (See Figure 44),
set the PXR to one of the unused addresses. (See Figure 45)
Figure 44
Figure 45
3. If the address of the PXR is changed, the remote control
and any RS-485 commands will also need to be changed to
match it.
Access to change
PXR address
ON
ON
RS-485 Commands
RS-485 Command String Syntax
* Command Input is only required for specific commands and may not be needed.
Calculating a Check Digit Code
SOM Product ID Address Command Command
Input*
Check Code EOM
> 06 00 XX XX XX
Steps Example
Start by writing your command or response Command go to home for address 00 is ">06000200"
Drop the Start and End of message character 06000200
List out the ASCII value for each unique character 0 = 48; 6 = 54; 2 = 50
Sum up the ASCII value of the command and add 85 48 + 54 + 48 + 48 + 48 + 50 + 48 + 48 + 85 = 477
Divide the total by 256. Record the remainder. 477/256 = 1 remainder 221
Convert the remainder value to a hexadecimal value 221 = "DD" in dexadecimal
The check digit for this command is the hexadecimal value DD