Posted 29 Oct 2017 I am using a cj1m with an OD203 output and other input and relay output cards. I want to use this card to feed pulses to a servo motor. I see from rise and fall times, the upper output limit of the OD203 is ~1 kHz or greater. That should be sufficient. Here is my example. I adjust my servo to 1000 pulses per rev. Using the OD203, I want to ramp up to 1 kHz on a signal. The servo is happily spinning at 1 Hz. On a signal change, I want to stop the servo at the next multiple of 1000 pulses within the ACC rate. The motor may spin 10 revs and stop or 10000 pulses. Will the card I have work for this application? Can I do this independently with two channels? Thank you. Share this post Link to post Share on other sites
Posted 30 Oct 2017 Please provide the complete part number of the CJ1M cpu. Per the W340 manual (Instruction Reference Manual) it appears CJ1M-CPU21/22/23 only support pulse output instructions. Share this post Link to post Share on other sites
Posted 30 Oct 2017 Mine is a CJ1M-CPU13. I now see the problem. Thanks. Share this post Link to post Share on other sites
Posted 30 Oct 2017 Indeed only CJ1M-CPU2[] series supports PULS instructions since they incorporated a Pulse Output module. However for low-frequency application like this, you can resort to the TPO instruction. TPO is basically a PWM generator with modifiable period and duty cycle. Share this post Link to post Share on other sites
Posted 30 Oct 2017 Please keep in mind TPO instruction is only supported with version 2 or later processors. Based on the initial post, I would strongly consider a CJ1W-NC213 module. This would allow for programming ACC / DEC and position for two axis. Just my two cents. Share this post Link to post Share on other sites
Posted 30 Oct 2017 Your gonna spend a ton of bucks on the NC213 module vs. upgrading to the latest CJ2M CPU with CJ2M-MD21* Pulse I/O module. Mt 2 Cents. Share this post Link to post Share on other sites
Posted 30 Oct 2017 I had not really thought about that option. I just checked: CJ2M-CPU13 + CJ2M-MD21x $ 1100.00 CJ1W-NC213 $ 1140.00 So it would be less expensive. From experience I do know the pulse output rate on the MD21x is much lower than the NC213, but don't think that is an issue in this case. Share this post Link to post Share on other sites