Tecfluid MX4B - Manual (Page 22)

22
Number Command
33 Read Device Variables
34 Write Primary Variable Range Values
35 Write Primary variable Damping Values
38 Reset Configuration Changed flag
40 Enter/Exit Fixed Current Mode
44 Write Primary Variable Units
48 Read additional device status
5.2 Common practice commands
Command implemented are the following:
6 BURST MODE
MX4H converter does not support Burst Mode.
7 OPERATING MODES
The converter MX4H implements fixed current mode.
To change to this mode Command 40 can be used.
The output current can be set to any fixed value between 4 mA and 20 mA.
By sending Command 40 to the MX4H with a value of “0” the fixed current mode will be
exited.
This mode is automatically exited on a device reset or power up.
Current signalling can be disabled using Command 6. In this case the current output will
be set to 4 mA.
Current signalling is normally disabled when the converter is part of a network coexisting
with other instruments.
When current signalling is disabled using the “Loop Current Mode = 0” in Command 6, the
only way in which current signalling can be enabled is through the use of Command 6 and
setting “Loop Current Mode = 1”.
If there is a power up, current signalling keeps this operating mode.
8 WRITE PROTECTION
Write protection is provided, selected by an internal jumper.
When the jumper is present, all commands are accepted. When the jumper is absent, no
write commands or local configuration changes are accepted.