Siemens S5-135U/155U appendix Startup

Central Controllers and Expansion Units Power Supply Units

4.1.3Startup

Start up the CC in the sequence of steps given here. This will take you up to the first trial run of the CPU. Given in parentheses are references to the chapters of the manual in which the subject is explained in detail.

To ensure a straightforward sequence for the startup, commence with one

CPU and no EUs.

Proceed according to the following steps to place the CC in operation:

Step

1

2

3

4

5

6

7

8

Action

Install the PLC so that the supply of air and exhaust air are unimpeded. If you fit two or more units (CC and EU) in one cabinet, observe the clearances and use baffles where necessary (see Chapter 3).

Fit a lithium battery (see Sections 4.3 and 4.4) or connect an external backup battery and connect the rechargeable battery.

Fit the CPU and set the mode switch to STOP.

Connect the power supply and connect the 24 V DC load supply to the monitoring input. Check the setting of the voltage selector switch (on 230/ 120 VAC power supplies). Fit a protective cover over the AC terminals.

Switch on the power and, if present, the 24 V load supply. Position the ªPowerº switch I.

Reaction: Green LED ªPower Supply okº in the ªDC 5 Vº field and in the ªDC 15/24 Vº field light up.

Hold the CPU switch in the OVERALL RESET position and move the switch from STOP to RUN.

Reaction: The ªStopº LED flashes rapidly.

Repeat Step 6.

Reaction: The ªStopº LED lights up constantly.

Keep the pushbutton in the RESET position and move the switch from STOP to RUN.

Reaction: Green ªRunº LED lights up, ªBASPº LED (output inhibit) goes off.

4-10	System Manual
	C79000-G8576-C199-06