S5-115F Manual Analog Value Processing
Standardization schematic:
The FB 250 function block converts the read in value linearly to the upper and lower limits (OGR
and UGR). The conversion is depending of the used module.
Analog input module AE 460
The analog output value XA is channel type dependend. It is used
for channel type 3 (4 to 20 mA):
XA =
UGR ·(2560-xe)+OGR ·(xe-512)
2048
for channel type 4 (unipolar representation):
XA =
UGR ·(2048-xe)+OGR ·xe
2048
for channel type 5 and 6:
XA =
UGR ·(2048-xe)+OGR ·(xe+2048)
4096
where: XA is the value output by the FB
xe is analog value read by the module
Analog input module AE 463
The analog output value XA is channel type dependend. It is used
for channel type 3 (4 to 20 mA):
XA =
UGR ·(1280-xe)+OGR ·(xe-256)
1024
for channel type 4 (unipolar representation):
XA =
UGR ·(1024-xe)+OGR ·xe
1024
for channel type 5 and 6:
XA =
UGR ·(1024-xe)+OGR ·(xe+1024)
2048
where: XA is the value output by the FB
xe is analog value read by the module
EWA 4NEB 811 6148-02
6-39
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