7. Individual RTD (Resistive Temperature Device) temperature [as polled by DDA tank
gauge(s)]
8. Alarm status bit definitions:
Bit Alarm Type Description
D1 LVLHH LEVEL HIGH-HIGH
D2 LVLHI LEVEL HIGH
D3 LVLLO LEVEL LOW
D4 LVLLL LEVEL LOW-LOW
D5 INTHI INTERFACE HIGH
D6 TMPHI TEMPERATURE HIGH
D7 TMPLO TEMPERATURE LOW
D8 MASHI MASS HIGH
D9 MASLO MASS LOW
D10 MASERR MASS ERROR
D11 Reserved
D12 SCERR SENSOR COMM. ERROR
D13 SOERR SENSOR OPERATION ERROR
D14 INTLO INTERFACE LOW
D15 Reserved
D16 Reserved
For each corresponding alarm bit:
0 = ALARM OFF
1 = ALARM ON
Reserved bits will always be set to 0 (OFF).
9. Undefined or reserved registers within the register map will return a maximum nega-
tive value (8000H, or 80000000H for register pairs). Attempting to read registers out-
side the register map (30917 or higher) will cause a Modbus Exception Error Code 02
(Illegal Data Value) to be returned.
10. GOVP = Gross Observed Volume Product.
11. GOVI = Gross Observed Volume Interface.
12. GOVT = Gross Observed Volume Total.
13. GOVU = Gross Observed Volume Ullage.
111
To Next Page
Loading...
