23
The failure messages ordered by their priority are:
NAME
GROUP
conF
Configuration
AL
##
Alarm number
##
If there is a
dt
type of failure, the values of ALL parameters in the group should be checked.
14.3. Failures type
F
i
The cause of the failure is external to the controller, and is, most probably, a sensor failure or sensor-line
break or shortage.
The lower display provides details about the failure.
Qim
#
Failure of measurement of input channel
#
.
yxin
Failure of cold-junction temperature measurement
When failure message is suppressed, the measurement values of the failing channels are replaced by
{++}
(too
big to be measured) or
<__>
(too small). If the input sensor is a thermoresistance, the first message hits to line or
sensor break, while the second message suggests line or sensor insulation failure. If the failure message is for an
input that is not used (no sensor connected), this input may be disabled in the configuration (see 7.4.1).
14.4. Message type
Er
This message may appear only while programming is exited (see 6.12).
14.5. Message type
FL
This message may appear only while programming is exited (see 6.12).
15. COMMUNICATION PROTOCOL
With ASCII protocol, the outputs may be controlled only through the interface, and with binary
protocol – only through the hardware!
15.1. Binary communication protocol
15.1.1. RS485
Baud rate
4800
Data bits
8
Control bit
parity
Stop bits
1
15.1.2. Message transmission
format:
FF FE xx … xx FE FF
FF FE
start of transmission
FE FF
end of transmission
xx
byte of transmission:
if xx is FD, FE, or FF, FD is transmitted first and then – xx