Bronkhorst®
Instruction Manual IQ+FLOW® Series Digital Mass Flow / Pressure Controllers for Gases
9.17.045V
28
4.2.2
Changing default control mode
Instruments are delivered with either analog or digital signal as default, depending on customer's requirement. After every
(power-up) reset the instrument will return to its default control mode. The default control mode can be changed with the
following parameter:
IOStatus
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
86
114/11
0xF258…0xF259/62041…62042
Bit 6 [7…0] represents the former analog jumper.
1 = default control mode is analog
0 = default control mode is digital
Procedure for changing default digital operation to default analog operation:
·
Read 'IOStatus'
·
Add 64 to the read value
·
Write 'IOStatus'
Procedure for changing default analog operation to default digital operation:
·
Read 'IOStatus'
·
Subtract 64 from the read value
·
Write 'IOStatus'
Control mode can also be changed by means of the
micro-switch
4.2.3
Disabling micro switch (single-channel versions only)
It is possible to disable the micro-switch on top of the instrument. This can prevent undesired use of this button. Disabling
the micro-switch can be performed with the following parameter:
IOStatus
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…255
86
114/11
0xF258…0xF259/62041…62042
Bit 3 [7…0] is used to disable the micro-switch.
0 = micro-switch disabled
1 = micro-switch enabled
Procedure to enable the micro-switch:
·
Read 'IOStatus'
·
Add 8 to the read
value
·
Write 'IOStatus'
Procedure to disable the micro-switch:
·
Read 'IOStatus'
·
Subtract 8 from the read
value
·
Write 'IOStatus'
