AUTOMATIC GROSS OVERLOAD PROTECTION
MAN-1111 Rev H
©Copyright 2015 LSI-Robway Pty Ltd
Page 152
Software AGOP Arming and Activation
Software performs the following checks with each software cycle to arm and then activate an
AGOP output:
1. Off-board duty selected.
2. Off-board Slew Proxy switch circuit CLOSED.
3. Absolute slew encoder indicating Off-board crane slew.
At this point AGOP is ARMED indicated by an AMBER Operator Console indicator light.
4. Hoist tension indicating 150% overload present.
5. Hoist rope tension overload validated by cross-referencing with luffing RAM pressures
exceeding 100%.
6. Pre-set 0.1 to 2.5 second delay exceeded after AGOP conditions met (transient filtering).
At this point AGOP is ACTIVATED indicated by a RED Operator Console indicator light. Both Main
and Aux hooks are monitored regardless of operator winch selection.
The AGOP output relay will remain in an activated energised state until a pre-set AGOP reset time
expires. The AGOP reset time is programmable from 0 to 60 seconds.
Crane Operator Console
In order to minimize human error with duty selection an operator console is provided which gives
the crane operator a single rotary switch to select duty and a second rotary switch to select sea-
state. The operator console has two indicator lamps which gives the operator an AMBER lamp
indicating that AGOP is armed and a RED lamp warning that AGOP has been activated. These
indicator lamps are driven by the RCI-4100 controller based upon conditions above.
Additional System Components Required
1. Ex d Operator Console with AGOP Status indicator lamps and rotary duty selector knob.
(LSI-Robway supply)
2. Ex d Absolute Value slew encoder with SSI interface (LSI-Robway Supply)
3. Luff-Ram pressure transducers. Bridge-type transducers compliant with IEC 60079.11
Simple Apparatus clause (LSI-Robway Supply).
4. Off-board slew proxy switch compliant with IEC 60079.11 Simple Apparatus clause
Periodic System Testing
Periodic testing shall be black-box testing. This means that neither the system software, nor
loadchart data is modified during the testing process.
In order to facilitate periodic testing after the crane has been commissioned an AGOP Isolator
switch is required. This lockout switch prevents an AGOP active output from reaching the winch
controls.
See Procedure TP0233, “AGOP Periodic Maintenance Test Procedure”.
Summary of Contents for RCI-4100
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