Siemens Simatic S7-200 CPU 210 User Manual

3-18
S7-200 Programmable Controller, CPU 210
C79000-G7076-C235-01
Refer to Figure 3-18 and follow these steps to enter the two contacts on the second rung of
the first network:
1. Select “Contacts” from the family listing and select “>= Integer” from the instruction listing.
This inserts a comparison instruction at the cursor position. This instruction compares the
value of the notification timer (Alert_Timer) with the time value.
2. Type either the symbolic name Alert_Timer or the absolute address T0 in the
highlighted area. Pressing ENTER highlights the second value for the comparison.
3. Type 600 and press ENTER. This instruction becomes true (and turns on) when the timer
is greater than or equal to 600, which equals 60 seconds.
4. Click the F4 toolbar button to create a normally open contact. Type Armed (or I0.2) and
press ENTER.
Contacts >= Integer
Network 1
F4 F5 F8F7F6 F10
F3F2
Sound the alarm!
“Panic_Alarm”
== Integer
Normally Open
Normally Closed
Not
<= Integer
Positive Transition
Negative Transition
>= Integer
Select “>= Integer” from the
instruction listing.
Contacts >= Integer
Network 1
F4 F5 F8F7F6 F10
F3F2
Sound the alarm!
“Panic_Alarm”
S
1
“Alarm_Bit”
VW0
>=I
VW0
Contacts Normally Open
Network 1
F4 F5 F8F7F6 F10
F3F2
Sound the alarm!
“Panic_Alarm”
S
1
“Alarm_Bit”
>=I
+600
“Alert_Timer”
“Armed”
Enter the address:
T0
or
Alert_Timer
Press ENTER and then
enter the time value:
600
Insert a normally open
contact and enter I0.2
(
or Armed).
Select “Contacts” from
the family listing.
Figure 3-18 Entering the Comparison Instruction and Next Contact
Getting Started with a Sample Program

Siemens Simatic S7-200 CPU 210 Specifications

General

Digital Inputs	6
Digital Outputs	4
Program Memory	2 KB
Data Memory	1 KB
Timers	128
Counters	128
Analog Inputs	0
Analog Outputs	0
Communication Ports	1 x RS-485
Power Supply	24 V DC
Type	CPU