Siemens SIMATIC S5-90U System Manual page 95

S5-90U/S5-95U
Table 4-1. Starting Up the S5-90U and S5-95U with and without External I/Os (Continued)
Procedures
Load program from memory
submodule into PLC if available (see
Section 4.3).
Otherwise, load program from
programmer.
Set operating mode switch to "RUN".
Test and correct program.
Set operating mode switch to "STOP".
Save program.
Switch on power supply for actuators.
Set operating mode switch to "RUN".
EWA 4NEB 812 6115-02b
Indications on S5-90U/S5-95U
LEDs (see Section 4.3).
• PLC:
Green operating mode LED lit;
green signal status LEDs of the inputs/outputs lit.
• External I/Os:
green signal status LEDs of the inputs/outputs lit.
• IM 90 (S5-90U):
Green LEDs lit.
• PLC:
Red operating mode LED lit;
green signal status LEDs of the inputs lit.
• External I/Os:
Red fault LEDs of the output modules lit;
green signal status LEDs of the inputs lit.
• IM 90 (S5-90U):
Green LEDs.
LEDs (see Section 4.4).
• PLC:
Red operating mode LED lit;
green signal status LEDs of the inputs lit.
• External I/Os:
Green signal status LEDs of the inputs lit.
• IM 90 (S5-90U):
Green LEDs lit.
• PLC:
Green operating mode LED lit;
green signal status LEDs of the inputs/outputs lit.
• External I/Os:
green signal status LEDs of the inputs/outputs lit.
• IM 90 (S5-90U):
Green LEDs lit.
Start-Up and Program Tests
4-7