Campbell CH201, Product Manual

Page: 37 / 44

7.3.2.1 RS-232 commands
An RS-232 host initiates communication by sending an ASCII command string CH201(n)x
terminated with <CR> (carriage return, 0x0D in hexadecimal format), where n = command
number and x = command value.
The CH201 response string begins with an asterisk (*), followed by the comma-delimited data
strings and a checksum <CRC>. The string is terminated with <CR><LF> (carriage return 0x13,
line feed 0x10). Responses are numerical values with decimal points except for Charge State and
Charge Source, which appear as ASCII strings.
Table 7-6: RS-232 commands and responses
RS-232 command and response Description
Command:
CH201(0)0<CR>
Response:
*,
nnnn , nnnn ,…,<CRC><CR><LF>
Where
nnnn = comma-delimited values and
strings
Read CH201 status.
Values Returned:
Battery voltage, battery current, load current, DC In 1
voltage, DC In 2 voltage, temperature, target battery
voltage, maximum power input voltage setting, battery
capacity, Qloss, charge state, charge source, check
battery
Command:
CH201(1)
nn.nn
<CR>
Where
nn.nn = temperature in °C
Response:
*Battery Temperature =
nnnn
,<CRC><CR><LF>
Where
nnnn = set temperature
Overrides the internal temperature measurement for
15 minutes (or until cancel
l
ed by a temperature restore
command). Useful for entering the temperature of a
remote battery. Temperature range is –40.00 to
100.00 °C.
Command:
CH201(2)0<CR>
Response:
*OK<CRC><CR><LF>
Restore temperature measurement to internal CH201
measurement.
CH201 12V Charging Regulator 27