In this case,
Alarm 22
is triggered and the device:
a) - Stops the pump, the heater and the refrigerating machine if the Safe
Mode function is deactivated.
b) - Starts Safe Mode if the Safe Mode function is activated.
In this case,
Warning 503
is triggered and the device sets the stored safety
set point once (write command
ID 32
, factory setting 20 °C) and continues
to control the temperature with this operating status.
It is therefore necessary to send any messages periodically so that the
monitoring feature recognizes that communication is still active.
If the status of communication monitoring changes again, the timeout value
for communication monitoring must be reset to 0. Monitoring is deactivated
as a result.
The timeout value can also be adjusted from the device menu.
7.2.4 Read commands
The interface module recognizes the following read commands, which you
can use to retrieve operating data of the constant temperature equipment.
Table 5: Temperature
ID Function
Unit, resolu-
tion
Command
2 Temperature set point
[°C]
IN_SP_00
3 Bath temperature (outflow temperature)
[°C], 0.01 °C
IN_PV_00
4 Bath temperature (outflow temperature)
[°C], 0.001 °C IN_PV_10
5 Controlled temperature (internal / external Pt / external analog / external
serial)
[°C]
IN_PV_01
7 External temperature T
E
(Pt)
[°C]
IN_PV_03
8 External temperature T
E
(analog input)
[°C]
IN_PV_04
14 External temperature T
E
(Pt)
[°C], 0.001 °C IN_PV_13
25 Overtemperature turn off point T_Max
[°C]
IN_SP_03
27 Limitation of outflow temperature TiH (upper limit)
[°C]
IN_SP_04
29 Limitation of outflow temperature TiH (lower limit)
[°C]
IN_SP_05
Valid for Integral IN, Variocool NRTL and
PRO constant temperature equipment
Valid for Variocool constant temperature
equipment
V1
Interface module LRZ 926
21 / 43