RS232 - DAYTON AMP

[fahd-bnh]

Hello guys, 

I'm trying to integrate Dayton amp with the LM5 through RS232, I don't know what's wrong. 

I have created a virtual point to send an on-off command  to zone 1, but it didn't work.
in the bellow picture of the registers of the amp.

this is the script that i have used 

require('serial')

device = '/dev/RS232'

port = serial.open(device, { baudrate = 9600, parity = 'none', databits = 8, stopbits = 1  })

-- get value of KNX object
value = event.getvalue()

if (value == true) then
  -- send power on command with returns to make them stick
  char = "<01PR01\r" 
  port:write(char)
else
  -- send power off command
  char = "<01PR00\r" 
  port:write(char)
end

-- close port
port:close()