VALVE 2G0401 - Caterpillar

The following tables contain information about the MMS signals. The data in the tables is available from the 2 Modbus ports. The ports are located in the MECP on the top slot of the PLC back plane.Refer to the Operation and Maintenance Manual, "Marine Monitoring System Configuration" for information about the setup of communications.Reference: "Gould Inc. Publication PI-MBUS 300 REV B"The data link is configured for the following settings:
8 data bits
1 stop bit
No parityThe node address and the baud rate can be configured by the user.Interfacing With a Shipyard
Provide table 3, table 4, table 7, table 8, and table 9.Provide the following list of information about the MMS configuration:
The MMS protocol for output is Modbus.
Ports for hardware are available. The ports have 9 pins. The RS-485 has one connection with 2 wires and two connections with 4 wires. The RS-232C has one handshaking connection and two connections without handshaking.
Provide the list of baud rates.
The network addresses can be a number between 1 and 247.
The system uses a serial cable that has 9 pins. The cable has shielding.Control System Inputs to PLC Redundant Relay Logic
Table 1
ISA TAG #    PLC CARD #    SENSOR DESCRIPTION    PLC REG ASSIGN    SIGNAL TYPE    ALARM    SHUT DOWN    SETPOINT TRIP    COMMENTS    
PRESSURE CONTACTORS    
PSLL-001     PLC01     Engine Low Oil Pressure: 144-0102     N7:01/07     DIGITAL         X     <
105 kPa (15.2 psi)     Low Speed    
PSLL-002     PLC01     Engine Low Oil Pressure: 144-0102     N7:01/07     DIGITAL         X     <
260 kPa (37.7 psi)     High Speed    
PSHH-003     PLC01     Engine High Crankcase Pressure: 117-1864     N7:07/11     DIGITAL         X     >
1 kPa (4.0 inch of H2O)     Enable When Fuel is On    
PSL-004     PLC02     Low Air Starting Pressure: 117-1864     N7:07/12     DIGITAL     X         <
750 kPa (108.8 psi)     Removed if Transducer is Ordered    
PSL-005     PLC02     Sea Water Low Pressure:     N7:01/08     DIGITAL     X         <
35 kPa (5.1 psi)     Removed if Transducer is Ordered    
PSL-006     PLC02     Low Jacket Water Pressure: 144-0102     N7:01/10     DIGITAL     X         <
20 kPa (2.9 psi) (Low RPM)
<
35 kPa (5.1 psi) (High RPM)     Removed if Transducer is Ordered    
PSL-007     PLC02     Low AC/OC Circuit Water Pressure: 144-0102     N7:01/12     DIGITAL     X         <
35 kPa (5.1 psi)     Removed if Transducer is Ordered    
SWITCHES/MISC CONTACTS    
YSL-001     PLC01     Low Battery Voltage: 7C-3508     N7:07/09     DIGITAL     X         < 22 VDC     Monitors Dc to MMS    
LSL-001     PLC02     Jacket Water Detection: 125-4340     N7:01/15     DIGITAL     X         Contact Close     Energizes RJWDA Relay    
HS-001     PLC01     Emergency Stop (Local)     N7:07/06     DIGITAL         X     Contact Close     Shuts Off Fuel And Air