Communications / Firmware - Fluke 6270A Service Manual

6270A
Service Manual
PCM PCA - This PCA is located inside the PCM and monitors internal PCM
sensors and pulses the control solenoids. The PCA contains the control
algorithm, monitors the primary pressure directly from the selected PMM, and
interfaces with the main PCA.
LED indication (located on the PM600 module PCA - visible when you service
the PM600 module):
•
Application running - on/off blink at 1 second intervals
•
Application running, no communication - on/off blink at 2-second intervals
•
Downloading or no application loaded - pause, double blink
•
Not functioning - full on or full off

Communications / Firmware

Figure 5 shows a high-level summary of the communication inside the Product
chassis. The main PCA and front-panel interface communicate with USB. The
main PCA, solenoid drivers, PMM, and PCM interface communicate over a
canbus interface.
Back Panel -- Comms PCA Tray
Front Panel
Display Processor
Display / Touch Keys Knob
16
USB / RS-232 / CANbus / ExtDrivers / Switch
Main Processor
USB ID CAN
USB
Figure 5. Communications/Firmware Block Diagram
GPIB
FPGA
Solenoid Driver PCAs
Sol Drivers Sol Drivers
6270-4003
6270-4005
Processor
ID ID
PMM Sensor
Processor
PMM Sensor
Processor
Controller
Processor
PMM Sensor Press
Processor Temp
PMM Sensor Press
Processor Temp
PMM Sensor Press
Processor Temp
Press
Temp
Press
Temp
P,T,
Valves
hxn309.eps