If you miss the download work and program doesn't work, it's possible to recover initial version firmware
by the ROM print board inside.
This is the procedure of recover the program to initial state.
１．Cut off power line, open the left-side cover panel. Slide the dipswitch 2 "ON" side.
Dipswitch 1 keep "OFF" side.
２．Put on power line while shortening "GATE" input signal, "COUNT" LED turn on and off for about 15s.
After that "COUNT" LED turn off and session will be done.
３．Put off power line again, then slide the dipswitch 2 "OFF" side. Dipswitch 1 keep "OFF" side.
４．Put on power line again then program starts by initial version.
From now the latest file must be installed by procedure ① to ⑥．
It's possible to operate multi units synchronously.
Then NCT08-01 contains 8 CH counters, it's possible to count more than 9 channels at synchronous mode
using multi units.
Here are procedures of this usage.
Connect the RUN signal (TTL OUT) of first unit to the GATE signal (TTL IN) port of second unit.
It's the same way to the third unit.
Send "DSAS" command to latter unit. The latter units don't stop counting automatically.
Send "START" command to latter unit. The latter units start counting action.
Depend on your usage, put on "GATE" signal to first unit.
Depend on your usage, preset timer stop command to first unit. ("CLTM","ENTS","STPRdddd")
Depend on your usage, preset counter stop command to first unit. ("CLPC","ENCS","SCPRdddd")
Activate count mode of first unit by the command "START".
This procedure activate more than one unit at the same timing chart.
Similarly, if you use several NCT08-01B,you will acquire 8n channel data with gate signal data acquisition.
Regarding NCT08-01B when it receives data read command, it stops count and timer action for 120 ns.
This stopping period is essential to get latest data to latch 32 bits count data.
If you read out count data 20 times/sec, total stopping period of counter is 120ns×20 = 2.4μs/sec.
Even if you read one or all counter at once, all counter and timer stops simultaneously, and
stopping period is always 120ns. Therefore, you may read data by minimum commands.
On timer stop mode or counter stop mode, there is no error measurement caused by counter stop on reading.
When in counting pulse during "GATE" signal which comes from outside, you'll notice that counting period
is shorter than read out period.
When in timer stop mode or counter stop mode, there is no dead time to read out count values.
(b) Notes when multiple counter units at simultaneous control
(See ６．Synchronous operation by multi counter units.)
In case of using multiple counter units at simultaneous control, if you read count in progress data of each units,
only units which are read count data stop count operation in 120ns.
Therefore, note that it occurs some errors among count data of modules because of
condition of count pulse, timing of reading, and dispersion of times of reading.
Example: Case of reading 20 times a second to one module only
This module have 120ns * 20 = 2.4μs delay in every seconds.
Count error occurs by 2.4μs/s(0.00024%)
6．Synchronous drive of multi units
7．Regulations and guidelines
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