85 of 105
As an example, a user wanting to read the engine speed and other related parameters (the
engine speed holding address is 0x40150), would use the 0x03 command with start
address 0x40150 and quantity 20, and a scan rate of 1000ms. The user’s device will
continue polling address 0x40150 to 0x40169 at 1000ms duration.
Note: There are only two addresses that support the 0x06 command, the address are
0x40098 and 0x40130.
10.3 Register Map
NOTE: All parameters are assumed to be unsigned integer values unless otherwise
specified in the “Range” column.
Table 25 – Modbus Register Map
Register Parameter Range Read /
Write
Data format Units
1
st
Generation ModBus Support
(For new applications utilize 2
nd
generation support)
Warning and fault shutdown are updated by controller once every 250ms.
40001
Highest Severity Event
(Read only)
bit 16 = Alarm State, bit 15-14 = Severity, Bits 13-10 = Reserved, Bits 9-1 =
Event #
40002
Previous Highest Severity
Event (R)
bit 16 = Alarm State, bit 15-14 = Severity, Bits 13-1 = Event #
40003 ~
40010
(Read
Only)
Each event uses 5bits,
b4, b3, b2, b1, b0 where b0 is the least significant bit.
b0 = The event status (warning or shutdown occurring)
0 = Not Active, 1 = Active
b2-b1 = The severity of the event
0 = Take No Action, 1 = Warning/Acknowledge
2 = Action Required, 3 = Take Immediate Action (shutdown)
b3 = Alarm Action (indicates if GSC400 is sounding buzzer)
0 = No Audible Alarm, 1 = Sound Audible Alarm
b4 = Warning/Failure Feature Enabled/Disabled
0 = Disabled, 1 = Enabled
40003
Events number 1 System Ready bit 4-0
Events number 2 Over crank bit 9-5
Events number 3 High Engine Temperature Warning / Shutdown bit 14-10
40004
Events number 4 Low Oil Pressure Warning / Shutdown bit 4-0
Events number 5 Over speed bit 9-5
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