Varec TankGate Interface 8315 Series - Manual (Page 74)

Installation Tank Gate Interface
64 Installation and Operations Manual
6.3.4 Grounding
To allow use in harsh industrial environments, the Tank Gate Interface incorporates ANSI/IEEE
surge protection. In solid-state control systems, grounding helps limit the effects of noise due
to electromagnetic interference (EMI) and provides additional surge protection when high
voltage switching circuits are connected to the unit. The grounding path for the Tank Gate
Interface and its enclosure is provided by the equipment grounding connector. The resistance
from the Tank Gate Interface ground to the grounding electrode must not exceed 1 ohm.
Additional ground wires should be connected as required for each I/O module.
Caution! All applicable codes and ordinances must be observed when wiring the Tank Gate
Interface.
6.3.5 Installing Communications
6.3.5.1 RS-232 Communications
•
To install the RS-232 communication option, connect an RS-232 cable to connector J7
(COM0).
Note The 8311 TGI only supports communication on COM0.
6.3.5.2 Power-Up
Before the field cables are attached, perform an initial system verification.
6.3.5.3 Initial system verification
•
Connect the power cable to power connector P1, then connect an RS-232 cable from a PC
with ViewRTU to J7 (COM0).
•
Power up the unit.
The CPU LED on the tank gauge interface module should toggle on and off. If the CPU indicator
is not flashing, turn off system power and proceed with the Troubleshooting and Calibration
chapter.
6.3.5.4 Establishing Host Communications
When the main system power is turned on, the Host communications status is set to On-line by
default. The Tank Gate Interface then waits for a valid poll from the Host computer. If the
communication cable is installed and the Host is running, a communications link is established.
Verify this condition with a hand-held terminal or ViewRTU.
6.3.5.5 Verifying Host Communications
•
Display the COM Point and verify that an On-line condition is indicated.