Emerson ControlWave Instruction Manual page 40

ControlWave I/O Expansion Rack Instruction Manual
SW3 Setting
Table 2-7. SCB Port Configuration Switch SW1 (For COM3)
SW1 Switch
Number
2-28
Table 2-6. CPU Board Switch SW3
Function
N/A
1
System
2
Firmware load
control
Force
3
Recovery
Mode
Backup Battery
4
Enable/Disable
Notes:
Table 2-7 describes switch settings for SW1 on the SCB board

which controls the RS-485 port (COM3) of the SCB. You may want
to review Section 2.4.3 before you set these switches.
Table 2-8 describes switch settings for SW2 on the SCB board; this

controls the RS-232 port (COM4) of the SCB.
Function for COM3 (RS-485) on the SCB
ON TX+ to RX+ Loopback (Use for Diagnostics or 2-wire only)
1
OFF No loopback (factory default)
ON TX- to RX- Loopback (Use for Diagnostics or 2-wire only)
2
OFF No loopback (factory default)
ON 100 Ohm RX+ termination (end node only)
3
OFF Not an end node (factory default)
ON 100 Ohm RX- termination (end node only)
4
OFF Not an end node (factory default)
Not currently used
5
Mode
Not currently used.
Enables / disables remote system firmware upgrade via
System Firmware Downloader:
ON (disables remote system firmware upgrade)
OFF (enables remote system firmware upgrade; factory
default)
Note: Remote system firmware upgrade using System
Firmware Downloader requires boot PROM version 06
(or newer) and system PROM version 4.7 (or newer).
Enables recovery mode. This allows for system firmware
upgrades. Values are:
ON (enables recovery mode)
OFF (disables recovery mode). – This is the factory
default.
Enables/disables the backup battery for SRAM and the
real-time clock. Values are:
ON (enables backup battery)
OFF (disables backup battery). – This is the factory
default.
Note: The unit ships from the factory with the backup
battery disabled to conserve battery power. Set this to
ON when you install the CPU.
Installation Revised Aug-2015