S5-115F Manual
Analog Value Processing
6
Analog Value Processing
Analog input modules convert analog process signals to digital values that the CPU can process.
Analog output modules perform the opposite function.
This chapter explains the relationship between the two conversion types.
6.1
Analog Input Modules
The analog measured value is digitized and stored in a data memory in the module. You can
transfer it to the CPU where it can be processed further.
Signal exchange between module and CPU
The CPU reads the digitized value from the module memory with the FB 250 ANEI. The total
measured value (2 bytes) is stored in the CPU. The measured value contains additional condition
code bits as well as the coded analog value.
460 and 463 analog input modules
There are two analog input modules available with the following characteristics:
6ES5 460-7LA12
-
Floating
-
Eight channels
-
2 range cards
-
60 V AC / 75 V DC maximum permissible isolation voltage between each channel and M as well
as between the channels
-
Not permissible for safety-related use
6ES5 463-4U...
-
Floating
-
Four channels
-
Measuring range set via plug-in jumpers
-
30 V AC / 75 V DC maximum permissible isolation voltage between each channel and M as well
as between the channels
-
Permissible for safety-related use.
EWA 4NEB 811 6148-02
6-1