Installation and Operating Manual

User Manual
040003A010 Rev A Page 13 of 25
3.4 DIGITAL COMMUNICATION INTERFACE (RS232)
The amplifier is supplied with a RS232 digital communication interface that provides status and
alarm information. The communications interface settings are described in detail in Table 3-6.
Table 3-6 Digital Communication Interface Settings
Voltage Level
RS232 voltage levels
Transmission Bit Rates
38.4 Kbps
No of Data Bits
8
Stop Bits
1
Parity
No parity
Flow Control
No flow control
The digital communication interface uses readable ASCII characters. Characters are sent by the
amplifier only in response to commands. Commands and responses are terminated by a carriage
return (“\r”).
If characters are sent to the amplifier before the carriage return (“\r”) and do not match a legal
command, the amplifier ignores the characters and sends no response. The amplifier will respond
to lower case version of commands (e.g. “sn?\r” or “Rt?\r”).
Digital communication commands are described in detail in Table 3-7
Table 3-7 Digital Communication Interface Commands
COMMAND
RETURNED ANSWER
NOTES
“CN?\r”
“CN=*********\r”
Example:
“CN=151238614\r”
Return Crescend serial number.
“SV?\r”
“SV=****\r”
Example:
“SV=0001\r”
Return software version.
“PN?\r”
“PN=**********************\r"
Example:
“PN=P25-20GA3-PS1-C8-
001\r”
Return part number.
“RN?\r”
"RN=****\r"
Example:
“RN=O\r”
Return revision number.