Schneider Electric 840 USE 106 0 manual 140, CHS 110 RIO Head

Using a Quantum IEC Hot Standby System

Start Standby The following table shows the steps to starting Standby.

Step Action

1Start the Standby controller.

2Check the LED display. If the system is functioning normally, the display should be as follows:

On the CHS 110 module, all three indicators should be steady, not blinking.

A blinking Com Act light signals that your system has detected an error.

lOn the corresponding CRP module, the Ready indicator is a steady green. The Com Act indicator on the Primary unit should also be a steady green, while the Com Act indicator on the Standby RIO head should be blinking slowly

Illustrations of the Primary and Standby Backplanes are shown below.

Primary	140
Backplane
	CHS 110 00		RIO Head
	HOT STANDBY		HOT STANDBY
	Active		Active
	Ready	Fault	Ready	Fault
	Run	Bal Low	Run	Bal Low
	Pwr ok		Pwr ok
	Modbus Com Err		Modbus Com Err
	Modbus! Error A		Modbus! Error A
	Com Act Error B		Com Act Error B
	Primary		Primary
	Mem Prt Standby		Mem Prt Standby
Standby	140
Backplane
	CHS 110 00		RIO Head
	HOT STANDBY		HOT STANDBY
	Active		Active
	Ready	Fault	Ready	Fault
	Run	Bal Low	Run	Bal Low
	Pwr ok		Pwr ok
	Modbus Com Err		Modbus Com Err
	Modbus! Error A		Modbus! Error A
	Com Act Error B		Com Act Error B
	Primary		Primary
	Mem Prt Standby		Mem Prt Standby

840 USE 106 00 January 2003 139