154 XFC G4 2103335 Rev AB
with a PC. The unit will stay awake as long as the PC is connected. If the battery is below 10.9 volts when the user disconnects,
the unit will go back to sleep after 2 minutes. If the battery voltage is above 11 Vdc, the flow computer will remain awake.
Upon wake-up, the flow computer performs the following functions:
— Stores present calculation periods accumulations in historical record.
— Zeros present calculation periods accumulations.
— Ends current daily record and start new daily record.
Tools needed:
- Multi meter (MM)
- Small slotted screwdriver
To remove the flow computer from sleep mode:
Connect the PC running PCCU32 to the flow computer with either an MMI cable (RS-232), a USB cable or an
Ethernet cable.
Check battery pack cable. It must make a good secure electrical connection with the circuit board BAT CONN
connector J16 (Figure 96:).
Check battery pack voltage with MM.
Replace with another battery pack if voltage is below 11 Vdc.
7.4 Troubleshooting Communications
7.4.1 Communications Overview
These troubleshooting procedures are applicable to all XSeries Flow Computers with an installed radio. Use Figure 102: as an
aid for troubleshooting communication problems. The three basic types of radio communications that can be used are:
— RS-232 Communications, using a RS-232 module
— RS-485 Communications, using a RS-485 module
— RS-422 Communications (available, but not detailed)
The radio/modem may be powered one of two ways: always on or switched. Specific system set up will determine what steps
are needed to power the radio/modem.
When switching power to a radio with Inhibit (SLEEP) mode, the COM 1 or COM 2 switched power line will go to the radios
inhibit (SLEEP) mode input. The radio(s) will be energized.
CAUTION - Property Damage: Before removal or installation of either the above communication interface
modules, it is important that the user disconnect any external battery charger and main battery pack cable
connectors from the board. Refer to Figure 96:
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