iHP Manual 112 | P a g e
Multi-Rack Operation
Multi-rack operation is functional on ISOCOMM SW v03.00.00
Multi-rack operation connection is:
When the modules are inserted in different iHP rack and connected in series or parallel.
When the modules are inserted in different iHP rack and there is a need to synchronize turn-on or
turn-off of the modules.
During multi-rack operation, Rack Synchronization Off should be enabled. This function can be configured in
the ISOCOMM WebTool Rack section. The number of racks included in the multi-rack operation should be
selected. Rack Synchronization OFF is REQUIRED when modules in parallel or series are connected to different
iHP racks.
The main purpose of Rack Synchronization Off is to ensure that all modules in the multi-rack operation:
Turn-on simultaneously
Turn-off when there is at least one module at fault.
Turn-off when there is at least one module commanded to turn-off via hardware or software.
When Rack Synchronization Off Operation is enabled, Module Synchronization Off will be automatically
enabled, but requires each rack be connected via Ethernet communication as it uses Ethernet communication
to perform this function. All IP addresses of the iHP rack, router and PC should be the same except for the last
octet. For example, each IP address will start at 192.168.2.xxx and each iHP rack, router and PC will have a
unique value for xxx (except for 0 and 255)
The following diagram shows the system configuration for Rack Synchronization OFF Ethernet communication.
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