Word 0: Instrument Status Application Layer Words 1 to 10: Point Reading These words contain the value of parameter P920 (Reading) for points 1 to 10, respectively. The reading is expressed as a percent of full scale, multiplied by 100, giving a range of –20,000 to 20,000 which corresponds to -200.00% to 200.00%. Refer to the Siemens Milltronics SmartLinx instrument documentation for a definition of “P920”. Note: These values may contain numeric level data for inoperative or malfunctioning points: refer to read word 0, and read words 11 to 20 for the actual operational status of the measurement points. Words 11 to 20:
Point Alarm and Status These words contain the corresponding alarm and status bits for indexed measurement points 1 to 10, respectively. Bit status: 0 = false 1 = true 7ML19981BH02 SmartLinx DeviceNet – INSTRUCTION MANUAL Page 31 Bit Description 00 to 09 Measurement Point Status Indicates the operation of measurement points 1 to 10 bit 09 08 07 06 05 04 03 02 01 00 index 10 9 8 7 6 5 4 3 2 1 0 = operational 1 = non-operational ‘Non-operational’ means that either the point is not configured or there is an error in the reading. Further information is available in the Point Alarm and Status words (words 11 to 20).
10 Operating Mode 0 = Siemens Milltronics SmartLinx instrument in RUN mode 1 = Siemens Milltronics SmartLinx instrument in PROGRAM mode 11 to 15 Reserved (These bits are reserved and set to 0.) Bit Description 00 point not in service point failsafe timer expired point failed (cable shorted, open, or transceiver problem) point temperature sensor failed reserved for future use level emptying level filling scan mode priority 01 02 03 04 to 12 13 14 15