Bronkhorst EL-FLOW Base 2014 - Manual (Page 23)

BRONKHORST HIGH-TECH
   Green LED Time Indication
0.2 sec off Instrument is busy performing any special function.
E.g. auto-zero or self-test
Green LED indication modes (no switch used)
   Red LED Time Indication
Off Continuously No error
Flash Variable Bus activity on the Modbus interface
On Continuously Critical error message
A serious error occurred in the instrument
Instrument needs service before further using
Red LED indication modes (no switch used)
3.7 Basic Parameters and Properties
3.7.1 Introduction
Every parameter has its own properties. These properties are given in a table as shown:
Type Access Range FlowDDE FlowBus ModBus
[type] RW  [x]…[y] [FB] [Pro]/[Par] [address]/[index]
Type
Unsigned char 1 byte character
Unsigned char[x] x byte array (string)
Unsigned int 2 byte unsigned integer
Float 4 byte floating point
Access
R The parameter is read-only
RW The parameter can be read and write
RW The parameter can only be written when the Init Reset parameter is set to 64. See Chapter
4.1.1, General Product Information for more details.
Range
Some parameters only accept values within a certain range:
[x] Minimal value of the range.
[y] Maximal value of the range.
FlowDDE
Parameter number in FlowDDE. Check chapter 3.3, “Basic RS232 Flowbus operation”, for detailed
information.
FlowBus
Process and parameter number to address parameters using the FlowBus protocol.
[Pro] Flowbus process number
[Par] Flowbus parameter number
Check document 9.17.027 , “RS232 interface with FLOW-BUS protocol”, for detailed information.
ModBus
PDU Address and register number to address parameters using the ModBus protocol.
[address] Hexadecimal PDU address .
[index] Decimal register number.
For the ModBus protocol every 2 bytes are addressed separately. Check chapter 3.4, “Modbus RS485
operation” for more details.
9.17.061 EL-FLOW Base Series Mass Flow Controllers Page 23