DickDV
Member
thanks for the data, harryg. A couple more questions and suggestions.
1. Do you have a potentiometer across J4 Pins 1,2, & 3? The factory software is looking for the process setpoint there. It may be you have repointed the setpoint to the keypad. Please advise.
2. I don't see any point in tying Pin 1 to the Digital Input Common and it might actually make trouble. I would pull that jumper so you have 4, 8, 13, and 17 jumpered together only. Your Run contact should then be connected 9 to 17.
3. Apparently you have removed the signal conditioner from the 4-20ma loop and landed the loop directly on 4 and 5. That's probably the better choice. That these terminals are labeled backward seems farfetched. I would at least try putting your loop down as labeled and see if your display picks up the process signal. (You can't believe everything you hear, not even from tech service sometimes!)
4. When you have the keypad displaying the condition of Analog Input 2, are you sure it is showing the input or is it possibly showing the output of the PID block?
Finally, I'm just now getting into the Programming Section in Chapter Four. Please respond to the above and I'll try to get ready for the next step.
You can imagine that I'm a bit prejudiced about the ABB products but I've had to deal with at least a dozen different manufacturers over the last 15 years and my judgement is that they all have strong and weak points. I try not to trash the other guys too much because usually the weakest link is the person programming the unit (that would be me!). Familiarity usually fixes most problems, it seems.
Hang in there. We'll get to the bottom of this.
1. Do you have a potentiometer across J4 Pins 1,2, & 3? The factory software is looking for the process setpoint there. It may be you have repointed the setpoint to the keypad. Please advise.
2. I don't see any point in tying Pin 1 to the Digital Input Common and it might actually make trouble. I would pull that jumper so you have 4, 8, 13, and 17 jumpered together only. Your Run contact should then be connected 9 to 17.
3. Apparently you have removed the signal conditioner from the 4-20ma loop and landed the loop directly on 4 and 5. That's probably the better choice. That these terminals are labeled backward seems farfetched. I would at least try putting your loop down as labeled and see if your display picks up the process signal. (You can't believe everything you hear, not even from tech service sometimes!)
4. When you have the keypad displaying the condition of Analog Input 2, are you sure it is showing the input or is it possibly showing the output of the PID block?
Finally, I'm just now getting into the Programming Section in Chapter Four. Please respond to the above and I'll try to get ready for the next step.
You can imagine that I'm a bit prejudiced about the ABB products but I've had to deal with at least a dozen different manufacturers over the last 15 years and my judgement is that they all have strong and weak points. I try not to trash the other guys too much because usually the weakest link is the person programming the unit (that would be me!). Familiarity usually fixes most problems, it seems.
Hang in there. We'll get to the bottom of this.