Siemens SIMATIC S5 Equipment Manual page 51

2.9 Sequence for the Start-Up of the 1P 241
Check for up–to–date software and hardware status.
1.1) Shielding of encoder lines (Shielding with potential (Mext) (e.g., by screw connecting the
metal housing of the connector on the 1P side).
1.2) Internal encoder supply (from 1P 241)
External encoder supply (at encoder)
1.3) Perform potential equalization with sufficient cross sections.
2) Setting the DIP switches on the basic module
Dip Switch: S1 (Module address = interrupt lines)
S2 (Group interrupt, peripheral byte O)
3) Configuring encoder supply voltage for incremental encoders on the 1P 241 basic
module
Encoder supply
4) Configuring the encoder matching modules for encoder supply voltage and input sig–
Encoder matching module
Incremental Prelimina contact/zero mark)
Absolute 1 L xcess–3 ray)
Absolute 2 BCD/Binary)
Absolute 3 nalog
Absolute 4 Synchronous–Serial
5) Insert module into slot of programmable controller (See section 8.8.)
6) Apply voltage supply (24 V external)
7) Setting up the data block DB (IP 241)
Set up a data block with a minimum length of 187 DWS
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8) Setting up start-up organization blocks (OB20to OB22)
– Save scratchpad flags
– Parameterize 1P 241 with FB 156
– Delete interrupts with FB 157 (BEF = any)
– Reload scratchpad flags
– Consider time requirements according to section 8.3
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see sections 2.1 to 2.8
see sections 2.1 to 2.8
see section 3.3.3
see section 3
see section 4
see section 5
see section 6
see section 7
see section 9" Programming Instructions"
see sections 2.3 to 2.8
Operating Instructions
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