Honeywell CIU 888 Configuration Manual page 125

Part No.: 4417584_Rev12
Getting Started
Parameters
Transparency mode
IP switch over decision
maker
Configuration Manual
CIU 888
Configuration options
Transparency mode: When the check box is selected,
it is said to be in Transparency mode.This indicates
transparency behavior of the Ethernet port. This setting
is applicable only to the redundant CIUs.
In this mode, CIU binds the IP address to Ethernet port
based on the current redundancy role.
•
Primary CIU binds to its IP address during active or
passive state when all the Ethernet links (marked
for IP Switch over decision maker) of the Secondary
CIU is down.
•
Primary CIU binds to Secondary CIU's IP address
during passive state when atleast one of the
Ethernet links (marked for IP Switch over decision
maker) of the Secondary CIU is up.
•
Secondary CIU binds to its IP address during
passive state when atleast one of the Ethernet links
(marked for IP Switch over decision maker) of the
Primary CIU is up.
•
Secondary CIU binds to Primary CIU's IP address
during active or passive state when all the Ethernet
links (marked for IP Switch over decision maker) of
the Primary CIU is down.
This option is applicable only for redundant CIUs and is
required for the host initiated switchovers to work prop-
erly since CIU doesn't support autonomous switchovers
This indicates whether Active CIU's Ethernet port status
is monitored by the Passive CIU to make IP switchover
decision.
If all the ports selected for "IP Switchover Decision
Maker" in Active CIU goes down (that means the Mod-
bus TCP/IP Host system cannot communicate to active
CIU), then Passive CIU's Ethernet port's bind to Pri-
mary CIU's Ethernet port address.
In case of Multiple host systems connected to CIU, we
need to select this option for the Ethernet ports where
the client host system (that can read, write data to CIU
and issue switchover command) is connected.
For example a site has ExperionPKS connected to
FTEA and FTEB ports and a third party Modbus TCP/IP
host system connected to LAN port and ExperionPKS
is the client host system (Issues switchover command
to CIU). In this case, FTEA and FTEB ports need to
selected for "IP Switchover Decision Maker" and LAN
port is deselected for "IP Switchover Decision Maker".
In this case, if both FTEA and FTEB links of Active CIU
goes down, then Passive CIU's FTEA and FTEB ports
bind to the Primary CIU's IP address so that Host Sys-
tem (ExperionPKS) can issue an ACTIVE CIU com-
mand and make the CIU as Active and continue its
operations.
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