Varec TankGate Interface 8315 Series - Manual (Page 101)

8315 TGI Troubleshooting
Varec, Inc. 91
8 Troubleshooting
8.1 Overview
This chapter describes the procedures used to isolate hardware faults. Three push-buttons and
eight status Led provide verification of Tank Gate Interface proper operation. If the Tank Gate
Interface is not functioning normally, the user is able to troubleshoot the device by performing
one or more procedures using the three push-buttons. These push-buttons and indicators are
also described in the Motherboard & I/O ExpansL&J Tankwayion Module Configuration chapter.
Caution! Not all troubleshooting instructions are valid for all Communications Modules.
8.2 Troubleshooting the Tank Gate Interface
8.2.1 LED Displays under normal conditions
Operations are normal if the Run, I/O and On-line indicators are flashing.
the table below represents the normal conditions for the Run, Output and
On-line indicators.
Figure 8-1: LED Indicators
Run indicator
The RUN Indicator provides the single most important feedback of proper system operation.
When the system functions properly, the RUN Indicator is constantly flashing at a 0.5Hz rate. If
this indicator ever goes to a steady state condition, either on or off, some malfunction has
occurred. In addition, relative processor loading can be determined by observing the RUN
Indicator duty cycle. Under normal conditions, this indicator flashes once every second.
Communications indicator
The Communications indicator provides communication line status. When it is toggling, the
system is exchanging data. As the system receives a valid message from the Host, this indicator
toggles. If the indicator is idle, the system is off-line.
TXD/RXD LEDs
When these LEDs are flashing, the system is exchanging data between the Tank Gate Interface
and any tank gauge.
Indicator Condition
Run Flashes once every second.
Com Toggles when the system is receiving data. Idle when
not receiving data.
TXD Every P011 causes the TXD LED to toggle
RXD Lights when a response is received