Filter
Top Products
172-082010_400 I Series Software Page 31 of 35
tracking warning bit will be set in the warning status word. This item configures or
reports the limit in the flow units chosen in the active gas record (G7). Writing to this
item will affect the value reported back by V21 below.
item 21:trckg warn limit: % of full scale
read V21(cr) or *[aa]V21(cr)
Sample reply: 5.0 SLM(cr)>
write V21= 2.00(cr) or *[aa]V21= 2.00(cr)
If the tracking warning enable is set (V22) and the tracking error remains above this
limit for longer than the time specified by the tracking warning delay (V23) the
tracking warning bit will be set in the warning status word. This item configures or
reports the limit as a % of the full scale flow value listed in the active gas record (G2).
Writing to this item will affect the value reported back by V20 above.
item 22:trckg warn enable:
read V22(cr) or *[aa]V22(cr)
Sample reply: 1(cr)>
write V22= 0(cr) or *[aa]V22= 0(cr)
This is a binary value that when enabled it will allow tracking error values that exceed
warning limits for a time longer than specified by the tracking warning delay to set bit
8 of the warning status word. Setting this bit also sets the bit 10 of the MFM config
word (S2).
item 23:trckg warn delay:
read V23(cr) or *[aa]V23(cr)
Sample reply: 0.00 S(cr)>
write V23= 2.0(cr) or *[aa]V23= 2.0(cr)
This defines the length of time in seconds between the start of an error condition until
the time it is reported by the warning status word. This will allow the valve time to
stabilize to a new setpoint without setting off the warning. A setting of 0.00 will result
in an immediate response.
item 27:valve drive: (read only)
read V27(cr) or *[aa]V27(cr)
Sample reply: 0.31 %(cr)>
This is a positive integer value in the range of 0 – 64000 that correspond to the internal
pulse width modulator output voltages between 0 – 5 volts.
item 28:valve set:
read V28(cr) or *[aa]V28(cr)
Sample reply: 41354(cr)>
write V28= 32000(cr) or *[aa]V28= 32000(cr)
This is the value that may be set between 0 - 64000 to set the pulse width modulator
voltage whenever the controller has been set variable/manual control by the MFC Mode
word.
item 29:valve crackg: (read only)
read V29(cr) or *[aa]V29(cr)
Sample reply: 32198(cr)>