21
Control
0 indicates that the instrument is in BASIS 2 Protocol mode.
1 indicates that the instrument is in BASIS 1 Protocol mode.
To set the command protocol
: write 0 or 1 to register 56.
∆
Caution:
The BASIS 1 protocol only works with flow units of SCCM, SLPM, NCCM, and
NLPM. An error will be returned if you attempt to switch to BASIS 1 protocol for an
instrument with different flow units "Changing the Setpoint" on page
28.
User Registers
User registers can be read and written by the end user, in contrast to factory registers, which
are intended only for factory use.
Instantaneous Data Registers
These registers provide the most current measurements made by the instrument.
Data Address
R/W
Notes
2100
R/W
The selected gas, an integer representing its gas number. If a
gas number is written for a gas that is not in the instrument, the
selected gas remains unchanged.
Added in V3.0.0.
2101
R
+1: If set, there is a mass flow overrange (MOV) condition.
+2: If set, there is a temperature overrange (TOV) condition.
+4: If set, there is a totalizer overrange (OVR) condition.
+8: If set, the valve is being frozen by the user.
+16: If set, valve thermal management is active (VTM).
Added in V3.0.0.
2102
R
The instantaneous temperature, a signed integer. Temperature
(°C) = value / 100.
Added in V3.0.0.
2103
R
The instantaneous flow, a signed 2-byte integer. Flow is equal
to the value after formatting with the factory-set number of
decimal places.
Added in V3.0.0.
2104–2105
R
The total volume since last power up or total reset, in the
volume units of the instrument, scaled by the factory-set
number of decimal places.
Added in V3.0.0.
2106
R
When read, this is the current setpoint, which may differ
from the commanded setpoint due to limited resolution on
configured maximum ramping, indicated by register 524.
Added in V3.0.0.
2107
R
The instantaneous valve drive. Valve drive (%) = value / 100.
Added in V3.0.0.