X20 system modules • Temperature modules • X20ATB312
2450
X20 system User's Manual 3.10
4.31.7.8.6.3 Hysteresis
Name
Hysteresis01 to Hysteresis04
A hysteresis can be set in order to avoid frequent status changes in the measurement range close to the limit
value. Here, a small section is defined at the edge of the valid range of values where the measured values retain
the status (valid or invalid) of the previous measured value.
Data type
Value
UINT
0 to 65,535
4.31.7.8.7 Configuring status messages
Errors are detected by the module and sent to the application. When using Function model 0 - Standard, the trigger
behavior of these error messages can be influenced by the "Delay" register.
In Automation Studio, an error message can be read either packed as the entire register or individually as bits.
4.31.7.8.7.1 Delaying error messages
Name:
ErrorDelay01 to ErrorDelay04
In order to avoid false alarms due to short-term measurement variations, the status messages sent to the PLC
can be delayed. This register determines the number of A/D conversions in which an error must exist before an
error message is sent.
Data type
Value
UINT
0 to 65535 [A/D conversions]
4.31.7.8.7.2 Delaying the sum error message
Name:
SumErrorDelay01 to SumErrorDelay04
This register can be used to set the delay used when sending bit 5 of the "Status0x" register to the PLC independent
of the other status messages.
The sum error can be delayed separately, independent of all other status messages.
Data type
Value
UINT
0 to 65535 [ms]
4.31.7.8.8 Communication
The received temperature data is assigned a timestamp and, depending on the configuration, made available with
different register names and data types.
4.31.7.8.8.1 Measured value – Temperature
Name:
Temperature01 to Temperature04
If the channel is configured for resistance measurement, the current temperature value is made available in this
register.
Data type
Value
DINT
-2,147,483,648 to 2,147,483,647
4.31.7.8.8.2 Measured value – Resistance
Name:
Resistor01 to Resistor04
If the channel is configured for resistance measurement, the current resistance value is made available in this
register.
Data type
Value
UDINT
0 to 4,294,967,295
