Analog Value Processing - Siemens SIMATIC S5-90U System Manual

S5-90U/S5-95U
12

Analog Value Processing

This Chapter deals with the analog value processing functions of the onboard I/Os. It also includes
general information on reading in and output of analog values by means of analog input and analog
output modules.
For information on analog value processing by means of analog modules (external I/Os) please refer
to
• Section 6.2 (Addressing analog modules)
• Section 15 (Specific information on individual modules)
Onboard Analog Inputs in the S5-90U and the S5-95U:
Number of
PLC
Inputs
S5-90U 0
S5-95U 8
Address assignments of onboard analog inputs of the S5-95U:
• Analog input channel 0: Address IW 40
• Analog input channel 1: Address IW 42
.
.
.
• Analog input channel 7: Address IW 54
Onboard Analog Outputs in the S5-90U and the S5-95U:
Number of
PLC
Outputs
S5-90U 0
S5-95U 1
Address assignments of onboard analog outputs of the S5-95U:
• Analog output channel: Address QW 40
Please refer to Section 3.3.5 for assignments of the onboard analog inputs/outputs in the S5-95U.
EWA 4NEB 812 6115-02b
Table 12-1. Onboard Analog Inputs
Electrical Input
isolation Range
- -
No 0 to 10 V
Table 12-2. Onboard Analog Outputs
Electrical Output
isolation Range
- -
No 0 to 10 V
or
0 to 20 mA
Analog Value Processing
Resolution Features
- Can be expanded by analog
input modules
10 bits Can be expanded by analog
input modules;
onboard analog inputs can
also be used as digital inputs
Resolution Features
- Can be expanded by analog
output modules
10 bits Can be expanded by analog
output modules
12-1