Siemens SIMATIC S7 System Manual page 719

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After power is applied, the module performs internal calibration for the analog-to-digital

converter. During this time the module reports a value of 32767 on each channel until valid

data is available on that channel. Your user program may need to allow for this initialization

time. Because the configuration of the module can vary the length of the initialization time,

you should verify the behavior or the module in your configuration. If required, you can

include logic in your user program to accommodate the initialization time of the module.

Representation of Analog values for RTDs

A representation of the digitized measured value for the RTD standard temperature range

sensors are shown in the tables below.

Table A- 107 Representation of analog values for resistance thermometers PT 100, 200, 500, 1000

°C (1 digit =

S7-1200 Programmable controller

System Manual, 11/2011, A5E02486680-05

and PT 10, 50, 100, 500 GOST (0.003850) standard

A.7 Thermocouple and RTD signal modules (SMs)

°F (1 digit =

553BTechnical specifications

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Simatic s7-1200