Series 2000 Communications Handbook

Modbus & EI Bisynch AddressesSeries 2000 Communications Handbook5.6. STATUS WORDSStatus words group together commonly accessed parameters in convenient categories so thatthey may be read (or occasionally written to) as a single transaction. Their main use is toallow the most commonly required process conditions to be read quickly. Examples are:Alarm statesAuto/Manual selectionRemote/Local selectionDisable front panel keys etc.Individual parameters exist for all status indicators that may be changed over thecommunications link, and these should be used for ‘write operations’. The exception is thedigital output telemetry status word, which may be written to, to set digital outputs, providedtheir function is configured to ‘No Func’.The 2200 series contains two Status Words1. Summary Output Status Word2. Control Status WordThese are both shown in the table below.Note, the detailed differences in the bit definitions between 2200 & 2400 in the SummaryOutput Status Word.ParameterModbus2400Bisynch2400Modbus2200Bisynch2200Fast Status byte.Read Only (Alsoavailable viaModbus Function 7)BIT74 FS(HEXformat)74 -DESCRIPTIONBit 0 Alarm 1 State ( 0 = Safe 1 = Alarm ) Alarm 1 State ( 0 = Safe 1 = Alarm )Bit 1 Alarm 2 State ( 0 = Safe 1 = Alarm ) Alarm 2 State ( 0 = Safe 1 = Alarm )Bit 2 Alarm 3 State ( 0 = Safe 1 = Alarm ) Alarm 3 State ( 0 = Safe 1 = Alarm )Bit 3 Alarm 4 State ( 0 = Safe 1 = Alarm ) Alarm 4 State ( 0 = Safe 1 = Alarm )Bit 4 Manual Mode ( 0 = Auto 1 = Manual ) Manual Mode ( 0 = Auto 1 = Manual )Bit 5 Sensor Break ( 0 = Good PV 1 =Sensor Broken )Bit 6 Loop Break ( 0 = Good closed loop1 = Open Loop )Bit 7 Heater Fail ( 0 = No Fault 1 = Loadfault detected )Sensor Break ( 0 = Good PV 1 =Sensor Broken )Loop Break (0 = Good closed loop 1= Open Loop )Heater Fail ( 0 = No Fault 1 = Loadfault detected )5-20 Series 2000 Communications Handbook Part No HA026230 Issue 2.0 Feb-00