Troubleshooting - Ieee-488 / Gpib; Figure 8-7: Ni At-Gpib/Tnt Settings; Figure 8-8: Ni At-Gpib/Tnt Advanced Settings Dialog - Ametek 2003RP User And Programming Manual

8.7 Troubleshooting - IEEE-488 / GPIB

This section provides guidelines for resolving communication problems that may occur when
using the 2003RP with or without the PGUI32 software with a IEEE-488 / GPIB interface.
Symptoms:
1. Unable to verify connection to the power source through IEEE-488 interface. Time-out
occurs any time an attempt is made to verify connection.
2. Communication seems to work but Error 100, Command Errors occur when sending a
series of setup commands to the AC source.
Things to check first:
1. Is the 2003RP interface option set to use the IEEE-488 interface instead of the RS232C
interface? The DIP switch on the rear panel is used to select the desired interface mode.
Refer to section 8.3.
2. Does the bus address selected in the System, Interface dialog match the address set
using the DIP switches on the 2003RP? The GPIB address selected must match the
settings on the DIP switch. If changes are made to the DIP switch setting, the 2003RP
power must be cycled off and on to have the new settings take effect.
3. Did you connect the cable in correctly and are both ends of the GPIB cable securely tied
down?
Resolution for Symptom 1
When using a fast IEEE-488 bus controller, the 2003RP‟s IEEE-488 interface may not
handshake fast enough to satisfy the controller‟s timing requirement. If this is the case, a
time-out will result any time a command is sent to the power source. To rectify this situation,
the IEEE-488 controller must be set to use delayed bus timing. For National Instruments
GPIB controller cards running under Windows™, this can be done from the device manager.
Select the GPIB interface and click on the NI-488.2M Settings tab. An Advanced button at
the bottom of the screen will provide access to the Bus Timing parameter. Set this value to

Figure 8-7: NI AT-GPIB/TNT Settings

2 sec to operate with the 2003RP
GPIB interface.
Figure 8-8: NI AT-GPIB/TNT Advanced
Settings Dialog