Emerson Process Management ControlWave XFC - Manual (Page 24)

1-10 / Introduction CI-ControlWave XFC
Table 1-2 - ControlWave XFC CPU Board Switch SW1 Assignments
Note: Except for SW1-4, ON = Factory Default
SW# Function Setting - (ON = Factory Default)
SW1-1 Watchdog Enable ON = Watchdog circuit is enabled
OFF = Watchdog circuit is disabled
SW1-2
Lock/Unlock
Soft Switches
ON = Write to Soft Switches and FLASH files
OFF = Soft Switches, configurations and FLASH files are locked
SW1-3
Use/Ignore
Soft Switches
ON = Use Soft Switches (configured in FLASH)
OFF = Ignore Soft Switch Configuration and use factory
defaults
SW1-4
Core Updump
See Section 3.6
ON = Core Updump Disabled
OFF = Core Updump Enabled via SW1-9 & SW1-10
SW1-5 SRAM Control
ON = Retain values in SRAM during restarts
OFF = Force system to reinitialize SRAM
SW1-6
System Firmware
Load Control * ON = Enable remote download of System Firmware
OFF = Disable remote download of System Firmware
SW1-7 N/A
SW1-8 Enable WINDIAG ON = Normal Operation (don’t allow WINDIAG to run test)
OFF = Disable boot project (allow WINDIAG to run test)
SW1-9/10 Recovery/Local
Mode
Both ON/OFF or SW1-9 ON & SW1-10 OFF =Recovery Mode
SW1-9 OFF & SW1-10 ON = Local Mode
* = Boot PROM version 4.7 or higher and System PROM version 4.7 or higher
1.3.4 I/O Board Assembly
The I/O Board assembly mounts against the Terminal Plate at the rear end of the Function
Module, i.e., the end furthest away from the the CPU Board. This board contains two
Microcontrollers that handles the following functions:
• Multivariable Transducer (MVT) or Gage Pressure Transducer (GPT) Interface
• Analog to Digital circuitry that monitors an external RTD and the unit’s power source
• Process I/O circuitry consisting of the following:
• Three 1-5V Analog Inputs (Optional)
• Two Discrete Inputs and Four Discrete (Sink) Outputs
• Two High Speed Counters
• One Analog Output (4 to 20mA) (Optional)
Input Power (J6) is run through a circuit that current limits the on board +V supply (for
AI’s and AO’s), and the field power for HSC devices.
The power supply operates from 6.0 to +30Vdc. A supervisory circuit monitors the incoming
power and the supply voltages. The supplies are shut down when the incoming voltage
drops to a level of +5.46Vdc (or less).
The I/O Board provides the interface hardware necessary to interconnect the assigned field
I/O circuits. Non-isolated power is generated and regulated by the I/O Board that provides
+3.6Vdc for all logic and bulk power for I/O field circuits and provides 3.3Vdc to the CPU
Board..
1.3.4.1 I/O Board Connectors
I/O Boards are equipped with 7 connectors that function as follows (see Table 1-3):