Contrec 515, Operation Manual

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Communications
515 HC04 - 8 June 2007 65
Note: The Floating Point variable is represented in IEEE-754 Floating Point
4-byte format and requires two 2-byte data registers:
This means that two data registers must be read or written to obtain, or
preset, one data value.
Instrument Exception Status
This register is available to verify the status of the instrument.
IEEE-754 Modicon Registers
1st byte low byte (register X)
2nd byte high byte (register X)
3rd byte low byte (register X+1)
4th byte high byte (register X+1)
Register Name Comments Read Only or
Read/Write
Type
41 Exception
Status 00 = no error
01 = analog input 1 failure
02 = analog input 2 failure
03 = analog input 3 failure
04 = analog input 4 failure
05 = invalid calibration parameter
06 = invalid reference parameter
07 = invalid property
08 to 09 reserved
10 = process parameters out of range
11 = input is over limit
12 = flow error detected
20 = system failure
21 = power supply is low
22 = new or failed clock battery
23 to 29 reserved
30 = alarm 1 active
31 = alarm 2 active
32 = alarm 3 active
33 = alarm 4 active R I
*
* I = Integer (2 bytes) (Holding Registers)