II - DCE FEL ČVUT v Praze

SIMATIC S7 Ex Analog Modules
Parameters of
analog input
modules
3-42
Tables 3-21 and 3-22 provide an overview of the parameters for analog input
modules and show what parameters
are static or dynamic and
can be set for the modules as a whole or for a channel group or a channel.
Table 3-21 Parameters of analog input module SM 331; AI 8 x TC/4 x RTD
Parameter Value range Default Type of
Effective Effect ve
Basic settings
Enable
parameters range
Diagnostic interrupt yes/no no
Hardware interrupt on
exceeding limit
yes/no no
Dynamic Module
Hardw. inter. at end of cycle yes/no no
Limit
Upper limit
from 32511 to - 32512
32767 Dynamic Channel
Lower limit
from - 32512 to 32511
- 32768
Diagnostics
Enable
yes/no
no Static Channel
Wire break monitoring yes/no
no
group
Measurement
Interference frequency 400 Hz; 60 Hz; 50 Hz; 10 Hz 50 Hz Dynamic Channel
suppression
group
Measurement mode – Deactivated
– Voltage
– Resistance 4-wire configuration
– Thermal resistance (RTD)
with linearization 4-wire
configuration
– Thermocouple with linearization and
compensation to 0oC – Thermocouple with linearization and
compensation to 50oC – Thermocouple with linearization and
internal compensation
– Thermocouple with linearization and
external compensation 1)
Voltage Dynamic Channel
group
Ranges See Tables 3-32 to 3-34 1V Dynamic Channel gr.
1) Following types of compensation are possible with this measurement method:
– Use of a compensation box
The compensation box must correspond to the connected type of thermocouple.
All thermocouples must be of the same type.
– Use of a thermal resistor for compensation (e.g. Pt 100)
The absolute terminal temperature is determined for compensation with a Pt 100 resistor in the climatic range.
In this case, the thermocouples to be compensated can be of different types.
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04