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Appendix A Models T801, 801E Software Menus (Reference: 06843C DCN6418)
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APPENDIX A-4: Signal I/O Definitions, Software Versions 1.0.3 (T-Series)/A.3 (E-Series)
Table A-4: Signal I/O Definitions
Signal Name Bit or Channel
Number
Description
Internal inputs, U7, J108, pins 9–16 = bits 0–7, default I/O address 322 hex
0–7 Spare
Internal outputs, U8, J108, pins 1–8 = bits 0–7, default I/O address 322 hex
0–5 Spare
I2C_RESET 6 1 = reset I
2
C peripherals
0 = normal
I2C_DRV_RST 7 0 = hardware reset 8584 chip
1 = normal
Control inputs, U11, J1004, pins 1–6 = bits 0–5, default I/O address 321 hex
EXT_CAL_MODE 0 0 = go into calibration mode
1 = exit calibration mode and go into measure mode
EXT_CAL_SPAN 1 0 = calibrate span
1 = calibrate zero
EXT_CAL_RANGE2 2 0 = calibrate range #2
1 = calibrate range #1
EXT_CAL_CO2
1
3 0 = calibrate CO
2
1 = calibrate O
2
4–5 Spare
6–7 Always 1
Control inputs, U14, J1006, pins 1–6 = bits 0–5, default I/O address 325 hex
0–5 Spare
6–7 Always 1
Control outputs, U17, J1008, pins 1–8 = bits 0–7, default I/O address 321 hex
0–7 Spare
Control outputs, U21, J1008, pins 9–12 = bits 0–3, default I/O address 325 hex
0–3 Spare
Alarm outputs, U21, J1009, pins 1–12 = bits 4–7, default I/O address 325 hex
1 = system OK
0 = any alarm condition or in diagnostics mode
ST_SYSTEM_OK2,
MB_RELAY_36
3
4
Controlled by MODBUS coil register
1 = conc. limit 1 exceeded
0 = conc. OK
ST_CONC_ALARM_1,
MB_RELAY_37
3
5
Controlled by MODBUS coil register
1 = conc. limit 2 exceeded
0 = conc. OK
ST_CONC_ALARM_2,
MB_RELAY_38
3
6
Controlled by MODBUS coil register
1 = auto-range 2 in use
0 = auto-range 1 in use
ST_AUTO_RANGE2,
MB_RELAY_39
3
7
Controlled by MODBUS coil register
07274B DCN6418