Siemens SIMATIC S7-200 System Manual page 26

S7-200 Programmable Controller System Manual
Entering Network 1: Starting the Timer
When M0.0 is off (0), this contact turns on and provides power flow to start the timer. To enter the
contact for M0.0:
1. Either double-click the Bit Logic
icon or click on the plus sign (+) to
display the bit logic instructions.
2. Select the Normally Closed
contact.
3. Hold down the left mouse button
and drag the contact onto the first
network.
4. Click on the "???" above the
contact and enter the following
address: M0.0
5. 5 Press the Return key to enter the Press the Return key to enter the
address for the contact.
To enter the timer instruction for T33:
1. Double-click the Timers icon to display the timer instructions.
2. Select the TON (On-Delay Timer).
3. Hold down the left mouse button and drag the timer onto the first network.
4. Click on the "???" above the timer box and enter the following timer number: T33
5. Press the Return key to enter the timer number and to move the focus to the preset time
(PT) parameter.
6. Enter the following value for the preset time: 100
7. Press the Return key to enter the value.
Entering Network 2: Turning the Output On
When the timer value for T33 is greater than or equal to 40 (40 times 10 milliseconds, or 0.4
seconds), the contact provides power flow to turn on output Q0.0 of the S7-200. To enter the
Compare instruction:
1. Double-click the Compare icon to display the compare instructions. Select the >=I
instruction (Greater-Than-Or-Equal-To-Integer ).
2. Hold down the left mouse button
and drag the compare instruction
onto the second network.
3. Click on the "???" above the
contact and enter the address for
the timer value: T33
4. Press the Return key to enter the
timer number and to move the
focus to the other value to be
compared with the timer value.
5. Enter the following value to be
compared with the timer value: 40 p
6. Press the Return key to enter the
value.
To enter the instruction for turning on output Q0.0:
1. Double-click the Bit Logic icon to display the bit logic instructions and select the output coil.
2. Hold down the left mouse button and drag the coil onto the second network.
3. Click on the "???" above the coil and enter the following address: Q0.0
4. Press the Return key to enter the address for the coil.
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Figure 2-7 Network 1
Figure 2-8 Network 2