62
Bit Input word Output word
00 T
0
Time Expired Flag T
0
Start Control Bit
01 T
1
Time Expired Flag T
1
Start Control Bit
02 T
2
Time Expired Flag T
2
Start Control Bit
03 T
3
Time Expired Flag T
3
Start Control Bit
04 T
0
Pause Control Bit
05
T
1
Pause Control Bit
06 T
2
Pause Control Bit
07 T
3
Pause Control Bit
08 T
0
Range Bits
09 Cannot be used.
10 T
1
Range Bits
11
12 T
2
Range Bits
13
14 T
3
Range Bits
15
There is a SET indicator and a time expired indicator on the Analog Timer
Unit for each timer. These indicators are lit when the corresponding timer’s
Start Control Bit or Time Expired Flag is ON.
When the Start Control Bit is turned ON, the timer begins operation and the
SET indicator is lit.
When the time set with the internal or external adjustment has expired, the
corresponding Time Expired Flag is set. The time up indicator also lights.
If the Pause Control Bit for a timer is turned ON from the PC, the timer will
cease timing and the present value (PV) will be retained. Timing will resume
when the Pause Control Bit is turned OFF. If the Start Control Bit is turned
OFF before the set value (SV) of the timer has expired, the Time Expired
Flag will not be turned ON.
Timer ranges are set in the output words as shown in the following table.
Timer
Output
word bit
0.1 to 1s 1 to 10s 10 to 60s 1 to 10m
T
0
08 OFF ON OFF ON
09 OFF OFF ON ON
T
1
10 OFF ON OFF ON
11 OFF OFF ON ON
T
2
12 OFF ON OFF ON
13 OFF OFF ON ON
T
3
14 OFF ON OFF ON
15 OFF ON OFF ON
Example
This example uses an Analog Timer Unit connected to a C28K CPU. Word
allocations are shown in the following table.
Setup
Timer and Counter Instructions Section 5–11
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