1. How do I get my DriveTools32 to communicate to the 1395?
2. Why am I getting a VP-10 feedback loss ?, (tach loss).
3. I replaced my Main Control Board, now I am having problems attempting to enter certain adapter board related parameters.
4. What do I do with fault VP-13?
5. I have a 1395-B74N-xx, or 1397- B060N-xx, and I am trying to reverse the rotation of the motor, or run my machine in reverse. I have a forward / reverse switch, or I am giving a negative speed command / reference, but it does not turn in reverse, what is the problem?

1.
Q? How do I get my DriveTools32 to communicate to the 1395?
A! Two methods of communication are available for the 1395, the most common being serial, through the DHT port using the hardware that is supplied with the Intelligent Terminal System, (ITS), the DOS predecessor to DriveTools. You must use this 1300-ITSSC converter and cable, as it is not supplied with DriveTools, and Data Highway Plus (DH+). DH+ requires a Multi-Communication board installed on the drive. When DriveManager boots up, RSLinx follows, then is minimized. It is necessary to close RSLinx to communicate serially to the drive. Ensure that only "1395RS 232" is selected. Select 4800 Bd. Also, in most cases it is necessary to use a DTR Pulse delay in the communication setup screen, and typically a value of 4000 works, but this is dependent upon the clock speed of the computer, sometimes a greater value is necessary. There is also a setting for DTR Pulse Width, and usually this can remain at zero, but the manual does give recommendations on this setting.

2.
Q?  Why am I getting a VP-10 feedback loss?, (tach loss).
A!  In most cases, an A-B 845H encoder is used, and most of them have an internal 5 volt regulator for the output. So, even when sourcing 12 volts from the drive, the output A and B square wave is only a 5 volt   magnitude. There are three jumpers on the main control board of the 1395, J8, J9 and J10 which must be set to match the output of the encoder. They are shipped in the 2-3 position which is for 12 volts, so if encoder has 5 volt output, they must be moved to the 1-2 position.  This is the most common reason for the VP-10 fault.  Many times people think that the jumpers change the voltage supplied to the encoder, but that is not the case, it only scales the main control board for the output back to the drive. The drive only delivers 12 volts for the encoder power, if the encoder requires a 5 volt input, a separate power supply must be used.

3.
Q? I replaced my Main Control Board,now I am having problems attempting to enter certain adapter board related parameters.
A!  You will need to initialize the new board or there may be difficulty attempting to enter some parameters.  Initializing the drive identifies the specific adapter boards installed in the drive and makes their parameters available for programming.

4.
Q?  What do I do with fault VP-13?
A!  If actual field current agrees with P117 Field Current Ref and P118 Field Current feedback, check the field voltage. If it is low, the field coils may be shorted.

5.
Q. I have a 1395-B74N-xx, or 1397- B060N-xx, and I am trying to reverse the rotation of the motor, or run my machine in reverse. I have a forward / reverse switch, or I am giving a negative speed command / reference, but it does not turn in reverse, what is the problem?
A! The problem is the fact that you have a Non-Regenerative Drive. When you make the forward / reverse selection at the terminal strip on a 1397 drive, or give a negative reference or command to the 1397 or 1395, the drive module attempts to fire the reverse power bridge to reverse the motor rotation. A regenerative drive has a forward and reverse ( positive / negative ) set of 12 SCR's, or power bridge assembly, a Non-Regenerative drive module has only one bridge, one set of 6 SCR's. As with any DC motor, reversing the armature or field polarity will cause reverse motor rotation, and a reversing contactor was widely used on older analog DC drives, but the newer digital microprocessor controlled drives accomplish this electronically, and adding a reversing contactor on one of these units is difficult, expensive and not a desirable solution. When selecting a drive for an application, the reversing capabilities of the system must be considered, not just the need for regenerative braking, or because the non-regen units cost less. On both the 1395 and 1397 products, the "N" in the catalog string is Non-Regenerative, and "R" is Regenerative.