Toshiba PROSEC T3 User Manual page 89

(5) Operation
In this mode, the channel 2 works relatively with the channel 1 operation.
The channel 1 is set as the auto-reset universal counter mode. The channel 2 counts
the internal clock pulses in the channel 1 reset interval.
When the channel 1 count value reaches the channel 1's set-point-1, the channel 2
count value is transferred into the channel 2's hold register, and both channel 1 and
channel 2 count values are reset to 0.
Resulting, the channel 2 measures the time of the channel 1 reset interval.
The frequency of the internal clock can be selected from 1, 10 or 100 kHz.
The table below shows the time units which increases the channel 2 count value by 1.
The count rage is 1 to 16777215. The countable duration is also shown in the table.
If the channel 2 count value exceeds the upper limit value (16777215) , it is reset to 0.
Count
mode
Normal
Precision
This mode function is enabled while both phase G and soft-gate for channel 1 are ON.
(even when the either is OFF, counting is not stopped)
When the channel 2's output-enable bit in the command register (YW) is ON, the
hardware comparison output (2S1) is enabled. In this condition, when the channel 2
count value is greater than the channel 2 set-point-1, 2S1 comes ON.
When the channel 2's interrupt-enable bit in the command register (YW) is ON,
PI312's interrupt function is enabled. In this condition, when the channel 2 count value
reaches the channel 2 set-point-1, the PI312 generates an interrupt signal for the T3.
For details of the channel 1 counter operation, refer to section 6.3 Auto-reset universal
counter mode.
Internal clock Time units (= 1 count)
1 kHz 1 ms
10 kHz 0.1 ms
100 kHz 0.01 ms
1 kHz 0.5 ms
10 kHz 0.05 ms
100 kHz 0.005 ms
6. Function Details
Countable duration
1 ms to 16777.215 s
0.1 ms to 1677.7215 s
0.01 ms to 167.77215 s
0.5 ms to 8388.6075 s
0.05 ms to 838.86075 s
0.005 ms to 83.886075 s
User's Manual
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