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Note
The controller answers to the GET command with the same
data format explained in the SET command.
Following are examples of answers:
1) “
03<STX>-01200<ETX>
”
The controller with process ID number 03 says that its
current setpoint is -1200 mV.
2) “
01<STX>UHI2122210<ETX>
”
The controller with process ID number 01 says that it is
a HI21222 model with firmware release 1.0.
The time-out for the first character of the controller answer
is 2 seconds (except answers to PHR, MVR and TMR as
explained below).
The minimum delay between the last received character
and first character of the answer is 15 ms.
The time-out for the complete controller answer to the PHR,
MVR and TMR commands is:
30 ms at 9600 bps
40 ms at 4800 bps
60 ms at 2400 bps
90 ms at 1200 bps
When the controller answers to the PHR, MVR and TMR
commands, the reading is sent as ASCII string followed
by a character (HI21523 only) indicating the control and
alarm status of the controller. This character can assume
the following values:
• “A”, control and alarm are ON;
• “C”, control is ON and alarm is OFF;
• “N”, control and alarm are OFF;
For example, a possible answer to the TMR command is:
“
03<STX>10.7C<ETX>
”
meaning that the current temperature reading is
10.7 °C, the control action is active and no alarm condi-
tion is present.
