Gerry,
I have not played with the charge pump at this point. However, that would be my guess as well.
Y114 Output CP (Charge Pump) Sink Output
You will discover various things about this board that are not intuitively obvious when you start playing with the board. First off if you watch their videos you will see that are all in Thai. The documentation is pretty good, however there are some aspects that provide no real details, such as the Output Signal Switching Device (OSSD). This is a great feature where you can add additional signals into safety circuit, in my case I am adding the Servo Amplifier error output signals, so you go into ESTOP if any driver has an error. While they show this setup in the Appendix as one of the Safety circuit options they don't give a great deal of detail. Actually, all inputs into the safety circuit need to be output a LOW signal when they are in an error free condition, something you will not find in the manual. Second, if you follow they documentation and set all ESS signals as active low you will have some difficulty getting everything to work. First off you will attempt to assign the ESTOP pin to X203, and as you know the estop is typically in series with limit switches, and since X203 is a NPN input it expects a low, since the positive side of the opto is pulled up to 24V internally on the MB2. Now if you assign X203 to ESTOP in MACH3/4 you will find it is in ESTOP when you come up. Some naturally you can invert the logic in ESS plugin and it works, but that is really not what they intended. You actually configure ESS plugin for ESTOP to be assigned to X202, which is labeled as OSSD. The OSSD signal is HIGH when ESTOP and any other safety circuits are ERROR FREE. SO, in the ESS configuration you need to set the logic level accordingly. Then all will work properly. All the ports have RED led indicators that light up with the signal is low, which is handy when you are trying to figure out exactly what is happening.
I got this board to replace the C25, C41 boards from CNC4PC, as well as two custom board I made one for differential drivers, and the other for Proximity sensors. All of that stuff works on this board and is all self contained, making for a much cleaner install.
The spindle section is also somewhat confusing, the relay aspect is clear and that all works correctly. The ESS plugin needs to setup Spindle to PWM control. Here are the aspects of the spindle setup.
ESS plugin
PINS CONFIG
Port1-Pin1 OUT LOW SPD SPINDLE
Port2-Pin1 OUT LOW NO1 Relay1
Port2-Pin14 OUT LOW NO2 Relay2
Port3-Pin17 OUT LOW AO AnalogOutput
INPUT SIGNALS
Spindle Motor PWM ESS-only AO Analog Output
Spindle ON ESS SPD SPINDLE
Spindle Fwd ESS NO1 Relay1
Spindle Rev ESS NO2 Relay2
MACH4 Output Signals
Spindle On ESS SPD SPINDLE
Spindle Fwd ESS NO1 Relay1
Spindle Rev ESS NO2 Relay2
Now on the MB2
Port1-Pin1 = SPD (Spindle) Sink Output
Port2-Pin1 = NO1 Relay1 contact
Port2-Pin14 = NO2 Relay2 contact
Port3-Pin17 = AO Analog Output
The MB2 takes the PWM signal and uses it to adjust a digital pot. Actually I can not find a digital pot on the board, so they call it the Anaspeed circuit but you can measure the pins AH,AO,AL and do not see any change in resistance as you adjust PWM, so that part is a little puzzling. You must connect it to the VFD with a 10V source for that aspect to work and I have not tested that part yet.
The strange part to me is the AO signal is what goes to the VFD, so why did they need the SPD SPINDLE on Port1-Pin1 and that is the Spindle On signal in MACH4?
I think my box got tossed in with all the Christmas rush orders and seemed to slip right through customs, so got lucky on that front. The wait will be worth your time as the board is high quality, we can compare notes when your board arrives. I am planning on adding the contactor as part of the e-stop circuity this week. Should have this all wrapped up and tested by the end of the week.
Russ