INPUT COMMAND DATA
(ORIGINATOR TO TARGET ASSEMBLY)
The following section describes the structure and content
of the Implicit command data input to the RCS2 Interface-
EIP card. There are a couple of important considerations
relating to these inputs.
EIP Implicit Command Input Enable
There is a system setting which enables or disables
scanning of these control inputs. If disabled, these input
bits will be ignored. The enable/disable setting is retained
in non-volatile memory on the Interface–EIP board and
configured via the RT serial console.
Command Input “Voting”
The RCS2 has several possible sources of command
inputs. These include the FMS main HMI screen, the
physically wired discrete input signals and now the
Ethernet-I/P communications. These different command
input sources are all concurrently actively scanning.
For the discrete input signals, an input will be considered
“active” if any of the sources of that signal are “active”. To
be inactive/off, all sources of that signal must be inactive.
For the setpoint signals (e.g. target flow), there is priority
order for “voting” with non-zero values. If enabled and
non-zero, the EIP setpoint value will be used. The next
priority will be given to an FMS “forced” setpoint value.
The third priority will be the Analog input reading. Finally,
if the Analog input reading is below 250mV, the flow
setpoint will be set to the default value for the job.
System Behavior on Loss of EIP
Implicit communications
The system monitors the EIP Implicit communications
activity. When it detects the loss of activity for more than
1 second, the system will respond in one of two ways.
1. If Implicit control inputs are DISABLED, the system will
take no action affecting operations of the RCS or the
EIP client.
2. If Implicit control inputs are ENABLED, the system will
take the follow actions:
a. Ensure system enters Save operating state by:
• Activate the Reset command bit for all Guns.
• Deactivate all other command bits for all Guns.
• Set Commanded Flow to 0 for all Guns.
b. Hold this condition for 0.5 second
c. Set EIP command registers to “no voting” state to
ensure user is able to control the system through
the display panel or physical I/O signals. The EIP
command registers will be left at:
• All command bits for all Guns will be Inactive.
• Commanded Flow for all Guns will be 0.
LN-9418-01-R0 (08/2018)
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INPUT
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