Siemens SIMATIC Manual page 23

Stage
1 Open the front doors of the CPU 313C.
2 Position the front connectors so that you can wire them:
To do this, push a front connector into the CPU until it snaps into position. The front connector
still sticks out of the module in this position. A wired front connector has no contact with the
module in the wiring position.
3 Strip 6 mm from the wire ends you want to insert in the front connector and attach appropriate
wire-end ferrules.
4 Wire the front connector (DI side) as follows:
Terminal 1: L+ of the power module; terminal 3: switch 1; terminal 4: switch 2; terminal 20: M of
the popwer module.
5 Wire the front connector (DO side)as follows:
Terminals 21 and 31: L+ of the power module; terminal 30: M of the power module.
6 Wire the free wire ends of the switches to L+ of the power module.
7 Lead the wires downward out of the front connectors.
8 Tighten the front connector (this sets the connection to the module ).
9 Close the front cover of the power module and the front door of the CPU.
Step 3: Commissioning the Hardware
Stage
1 Connect the programming device to the CPU with the programming device cable. If you use a
cable with PROFIBUS connectors, you will have to turn on the resistors in the connectors.
Close the front door of the CPU and put the mode selector switch to STOP.
2 Connect the power cable to the network and switch on
the PS 307 power supply module.
3 Carry out a memory reset in the CPU as follows:
– Press the mode selector switch to MRES. Keep the mode selector switch in this posi-
tion until the STOP LED comes on for the second time and stays on (this takes 3 sec.).
You can let go of the mode selector.
– Within 3 sec. you must press the mode selector switch back to MRES. The STOP LED
starts to flash rapidly and the CPU carries out a memory reset. You can let go of the
mode selector. When the STOP LED comes on permanently again, the CPU has com-
pleted the memory reset.
4 Raise the programming device and start SIMATIC Ma-
nager on the Windows desktop.
5 Activate switch 1.
6 Activate switch 2.
Automation System S7-300, Getting Started – CPU31xC:Commissioning:
A5E00105538-02
Wiring the Front Connectors of the DI and DO
What to Do Result
The DC24V LED lights up on the PS.
All the LEDs on the CPU come on
briefly; the SF LED and the DC5V
LED remain on. The STOP LED
starts to flash slowly and requires
memory reset (see 3).
A SIMATIC Manager window ap-
pears.
The I124.1 LED on the DI comes on.
No LEDs light up on the DO.
Die I124.2 LED on the DI comes on.
No LEDs light up on the DO.
5