Weld334m - User’s manual
F384-CPU Microprocessor card
25
Code:33038400
5. F384-CPU Microprocessor card
This is the system calculation centre and it is fitted with a MCU Motorola 68332 card
(20MHz clock). Data and program RAM resides on flash eprom (1MB).
Permanent data is stored in a buffer battery.
The CPU has 2 ports, an RS485 full/duplex port for the HHT4300 programming terminal or
a Laptop (P1 Sub-d 9-way connector located on the front part), and another one for
connecting the multifunctional display (internal port).
CPU status Led indicators:
LOWBATT - Red: illuminated during power reset (when switching on the
Control device) and when the reset is given via the push
button.
If it stays On during the operation (RUN led indicator
illuminated) this indicates that the battery is nearly down.
RUN - Green: the processor is operating correctly when
illuminated.
This indicator is OFF during the reset or when the Watchdog
(indication of Fault) condition intervenes.
Reset push button
The Reset push button is placed in the lower part, This control has direct
influence on the 68332 and is used (in case of system shutdown) to re-
start the program with no need to cut off power to the control device.
The Reset control is not an alarm reset and it must not be used to this
end.
Internal battery for data backup
Lithium battery with surveying circuit of the charge status and Supercap
(high capacity capacitor) used to store data during the replacement. The
battery is housed in a container which facilitates the replacement.
To replace the battery, refer to Appendix A - Maintenance
Average battery life
Extinction Operating condition Duration
(years)
Daily 6 working days 3
Weekly 5 working days 4
Weekly 6 working days 5,4
P1 - 9-way, Sub-d socket connector
RS485 serial communication port for the connection to the HHT4300
programming unit or to a PC
Pin Signal Description
1/6 0VH Earth
2/7 +VH HHT4300 unit power supply
3N.C. Pin bias
4 RXD+ Data reception +
5 TXD+ Data transmission +
8 RXD- Data reception -
9 TXD- Data transmission -
Maximum length of connection cable: 100m
RESET
F384-CPU
RUN
LOW
BAT.
P
1
To Next Page
Loading...