Siemens SIMATIC ET 200AL, System Manual

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Parameters/address space
4.4 Structure of a data record for dynamic reference temperature
Analog input module AI 4xRTD/TC 4xM12 (6ES7144-5KD50-0BA0)
Equipment Manual, 08/2021, A5E48753535-AB
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Hardware interrupt high/low limit 1 or 2
Enabling of a hardware interrupt when the high limit 1 or 2 or the low limit 1 or 2 is violated.
Requirement: An OB 4x must be assigned to the CPU/device.
Additional information on the structure of hardware interrupts is available in the section
Interrupts (Page 36).
High/low limit 1 or 2
Specify a threshold at which a hardware interrupt is triggered when it is exceeded or
undershot.
See also
Parameters (Page 20)
4.4 Structure of a data record for dynamic reference temperature
The WRREC instruction is used to transfer the reference junction temperature via data
record 192 to data record 195 to the module.
The description of the WRREC instruction can be found in the online help from STEP 7.
If you have set the "Dynamic reference temperature" value for the "Reference junction"
parameter, the module expects a new data record at least every 5 minutes. If the module
does not receive a new data record within this time, it generates the "Reference channel
error" diagnostics message.
Assignment of data record and channel
The assignment of the channels is:
•
Data record 192 for channel 0
• Data record 193 for channel 1
• Data record 194 for channel 2
• Data record 195 for channel 3