Varec 8300 series, Installation And Operation Manual, Page: 20 / 150

Hardware Tank Gate Interface
10 Installation and Operations Manual
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Re initialize System Hardware
•
Clear Scratch Memory
•
Verify Database and Re initialize if Invalid
•
Reset All Timers
•
Enable Communications
Figure 2-9: Switches SW3 on the Tank Gate Interface Motherboard
2.2.2.2 Hard Reset
A special form of Reset is available for occasions when the battery backed-up data base must
be re-initialized. This type of reset, the Hard Reset, can be performed before a database is
downloaded from a host PC.
Caution! The Hard Reset should be used as a last resort if the Tank Gate Interface is not
functioning. A Hard reset clears the installed database. For the Hard Reset procedure, refer
to the Troubleshooting and Maintenance chapter.
2.2.3 Communications
The Communications installation requires connection of the appropriate communication cable
to one of two connectors. The available options include RS-232 and RS-485 communications.
•
COM0 (RS-232) (J7)
•
COM1 (RS-232 or RS-485) (J5)
•
COM1 Transmit Control (RS-232) (J6)
•
COM1 Hardware Handshaking Switch (SW1)
•
COM1 RS-232/RS-485 Selection Switch (SW2)
•
COM1 RS-485 Terminating Resistor Jumper (W2)
Note COM1 is not available on the 8315 Tank Gate Interface
RESET
SW3
EARTH
NEUTRAL
LINE
SURGE GND
A/TXD
B/RXD
GND
RTS
CTS
TXD
RXD
GND
+15V
+5V
GND
-15V
+
-
VFIELD
COM1
COM 0
AUX POWER
VFIELD=48V
VFIELD=24V
RESET
RS232
RS485
COM1
HARDWARE HANDSHAKING
A B