Appendix A – e-TRIM Modbus Registers

The following list is a description of the relevant Modbus registers in the e-TRIM system. For communications, the e-TRIM supports Modbus on the Host 485 port and ModbusTCP through Ethernet.

11	Active burner bitmap
14	Modbus address
15	Master Setpoint (2 decimal places)
16	Deviation alarm band setpoint (2 decimal places)
17	Out of band alarm delay time
18	Alarm disable bitmap
19	Alarm bitmap, burners 1 - 16.
20 - 35	O2 readings, sensors 1 - 16, 2 decimal places.
68 - 83	High Fire ON, sensors 1 - 16.
116 - 131	O2 trim delay, sensors 1 - 16.
132 - 147	O2 trim interval time, sensors 1 - 16.
148 - 163	O2 alarm state, sensors 1 - 16.
	0 = normal, 1 = bad communications, 2 = out of and pending, 3 = out of band.
164 - 179	Alarm delay timer (sec), sensors 1 = 16.
180 - 195	O2 offset, sensors 1 - 16.
220 - 235	Slave communications status, boards 1 - 16. 0 = bad communications, 4 = OK.
460	Critical alarm bitmap
461 - 476	Critical alarm, sensors 1 - 16.
477 - 492	Critical alarm set point, sensors 1 - 16.
493	Critical alarm acknowledge. 1 = acknowledged.
600	High fire total time (sec), sensor 1
601	High fire total time (hr), sensor 1
602	Low fire total time (sec), sensor 1
603	Low fire total time (hr), sensor 1
604	High fire timer, sensor 1
605	Low fire timer sensor 1
606 - 611	Timers for Sensor 2
612 - 617	Timers for sensor 3
618 - 623	Timers for sensor 4
624 - 629	Timers for sensor 5
630 - 635	Timers for sensor 6
636 - 641	Timers for sensor 7
642 - 647	Timers for sensor 8
648 - 653	Timers for sensor 9
654 - 659	Timers for sensor 10
660 - 665	Timers for sensor 11
666 - 671	Timers for sensor 12
672 - 677	Timers for sensor 13
678 - 683	Timers for sensor 14
684 - 689	Timers for sensor 15
690 - 695	Timers for sensor 16