Hi. I have a microLOGIX 1400, nice kit, cheap and you can get a cheap flavour of RSLogix (vis. micro) just for this controller. Anyway, I have looked and read and can't find any definitive PWM PTO examples. So I ask:
Setting up at function file seems easy enough but to make everything transparent and helpful the function file(s) ie: PWMX:0 or PWMX:1 ... PWMX:2 are the three function files (FF). So we choose 1 of the FF's, say PWMX:2; this FF has 16 parameters; OUT, DS, RS, AS, PP, IS, ED, NS, EH, ES, ER, OF, OFS, DC, DCS, ADD. Most of these are self explanatory and the main parameters to set (I believe) are: OUT (set to the number of the physical output on controller, for ML1400 this is either 2,3 or 4. I have set to 3. OF (the Output Frequency in Hz, I have set to 1000). DC (the Duty Cycle, I have set to 500 for 50%). ADD (Accel. Decell Delay, I have set 100). I am not sure what the PP parameter is, it says Profile Parameter Select and takes a Boolean argument, so either 1 type of wave profile or another but I don't know what the two are.
Now, when it comes to the physical wiring I am a little confused. I have a 24VDC motor, PSU and ML1400.
I have the COM(mon); COM2, wired to the V- of PSU.
I have the OUT3 wired to the -of DC motor.
I have the +of DC motor wired to the V+ of PSU.
The motor will not drive, I have changed many of the parameters in FF got buzzing noises but no drive.
Can anyone see what I am missing? Would appreciate a look.
I am thinking now as I write that maybe I need to power the FETs somehow or other????
Any help would be appreciated.
Cheers
Moto
Setting up at function file seems easy enough but to make everything transparent and helpful the function file(s) ie: PWMX:0 or PWMX:1 ... PWMX:2 are the three function files (FF). So we choose 1 of the FF's, say PWMX:2; this FF has 16 parameters; OUT, DS, RS, AS, PP, IS, ED, NS, EH, ES, ER, OF, OFS, DC, DCS, ADD. Most of these are self explanatory and the main parameters to set (I believe) are: OUT (set to the number of the physical output on controller, for ML1400 this is either 2,3 or 4. I have set to 3. OF (the Output Frequency in Hz, I have set to 1000). DC (the Duty Cycle, I have set to 500 for 50%). ADD (Accel. Decell Delay, I have set 100). I am not sure what the PP parameter is, it says Profile Parameter Select and takes a Boolean argument, so either 1 type of wave profile or another but I don't know what the two are.
Now, when it comes to the physical wiring I am a little confused. I have a 24VDC motor, PSU and ML1400.
I have the COM(mon); COM2, wired to the V- of PSU.
I have the OUT3 wired to the -of DC motor.
I have the +of DC motor wired to the V+ of PSU.
The motor will not drive, I have changed many of the parameters in FF got buzzing noises but no drive.
Can anyone see what I am missing? Would appreciate a look.
I am thinking now as I write that maybe I need to power the FETs somehow or other????
Any help would be appreciated.
Cheers
Moto