Siemens SIMATIC S5 Equipment Manual

Programming Instructions
R 02/92
9.3
Function Block FB 157
(PER:WST)
9.3.1 Function Description
With the function block “control position decoder”, the following functions can be performed:
– Read actual values
– Read track identifier bits
– Read, delete or modify track setpoints
– Synchronize
– Special functions
The function block is usually called in the cyclic program. Prior to calling this function block, the
module with the function block FB 156 (PER:WPA, parametrize position decoder) must be sup-
plied with the initial data.
For evaluation of the process alarms or interrupts, the function block
PER:WST can be called in a
block of the interrupt–controlled processing (OB 2 to 06 9).
Function
Controlling the module “digital position decoder 1P 241”
9 – 14
1P 241 Equipment Manual
@.5W’rwnsA(21989, order No.: 6ES5998-0KD21
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Siemens SIMATIC S5 Specifications

General

Product type designation	SIMATIC S5
Programming language	STEP 5
Digital inputs	Varies by model
Digital outputs	Varies by model
Analog inputs	Varies by model
Analog outputs	Varies by model
Supply voltage	24V DC
CPU Type	Varies by model
Memory	Varies by model
Digital I/O	Varies by model
Analog I/O	Varies by model
Communication	PROFIBUS
Operating Temperature	0°C to 60°C
Relative Humidity	5% to 95% (non-condensing)