32
Note
If the controller is not in control or idle mode and the tem-
perature reading is requested through the TMR command,
the controller answers with the last acquired reading when
it was in control or idle mode.
Note
After a recognized PWD command is received, the controller
allows a maximum of 1 minute without receiving data, after
which it locks again and a new PWD command is needed
to perform password protected operations.
Following are examples of commands for setup items:
1) “
03 SET 22-01200<CR>
”
This command sets the setup item 22 (relay 2 setpoint)
of a mV controller, identified by the process ID number
03, to the -1200 mV value.
2) “
01 SET 33+015
◊◊
<CR>
”
This command sets the setup item 33 (max. relay ON
time) of a controller, identified by the process ID number
01, to 15 minutes. The
“
◊
”
character means blank.
Once the controller has received a command, it answers
with its 2-digit process ID number followed by:
• ACK (Hex 06)
If the controller recognizes the received command
and performs the requested task;
• STX (Hex 02) ,
Data
, ETX (Hex 03)
If the received command is a request of data;
• NAK (Hex 15)
If the received command is not recognized (e.g. the
syntax is wrong);
• CAN (Hex 18)
If the controller cannot answer the request (e.g. the
password was not sent, the controller is in setup
mode, the setup item is not available in that model,
etc.)
