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S5-115U Manual
•
Activation of the EMERGENCY STOP facility must create a hazard-free state for personnel and
plant:
- Actuators and drives which could cause hazardous states (e.g. main spindle drives for ma-
chine tools) must be switched off.
- On the other hand, actuators and drives which could constitute a hazard to personnel or
plant when switched off (e.g. clamping devices) must not be switched off by the EMERGEN-
CY STOP facility.
•
Activation of the EMERGENCY STOP facility must be detected by the programmable controller
and evaluated in the control program.
•
Connecting cables and signal cables must be installed in such a way that inductive and capa-
citive interference does not adversely affect the automation functions.
•
Automation equipment and the operator controls for the equipment must be adequately pro-
tected against unintentional operation.
•
In order that wirebreaks on the signal side cannot lead to undefined states in the automation
equipment, relevant hardware and software precautions must be taken when connecting in-
puts and outputs.
4.6.2
System Start-Up Procedure
The following is a prerequisite for starting up a system:
The system and the S5-115U must not be live, i.e. the main switch must be off.
Step 1: Visual check of the installation; to VDE 0551, 0160 and 0113.
- Check mains voltage.
Protective ground conductor must be connected.
- Make sure that all plugged-in modules are screwed tight to the subrack.
- Compare I/O modules plugged in with the assignment plan (note fixed or variable slot
addressing).
- In the case of I/O modules, make sure that high-voltage lines (e.g. 220 V AC) do not termi-
nate at low-voltage connectors (e.g. 24 V DC).
- When using nonfloating I/O modules, make sure that the M (0V reference) potential of the
supply voltages for sensors and actuators is connected to the grounding terminal of the
mounting rack (M
Ext
Step 2: Starting up the PLC
- Disconnect fuses for sensors and actuators.
- Switch off the power circuits to the actuators.
- Turn on the main switch.
- Turn on the power supply.
- Switch the PLC without memory submodule to STOP.
- Connect the programmer to the CPU.
After the power switch is turned on, the green LEDs light up on the power supply and the red
ST (STOP) LED lights up on the CPU.
- OVERALL RESET of the PLC.
- Transfer the program in the case of RAM operation.
- Switch the PLC to "RUN".
The red ST LED goes out and the green "RN" LED lights up.
EWA 4NEB 811 6130-02b
-M
connection).
Int
PLC System Start-Up and Program Test
4-15
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