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172-082010_400 I Series Software Page 14 of 35
This reports the hardware configuration of serial buss. This is set by the RS232/485
jumper and the Duplex/Simplex jumper inside the electronics enclosure. Could be
RS485:Duplex or RS485:Simplex
item 5 :macid :
read S5(cr) or *[aa]S5(cr)
Sample reply: x61(cr)>
write S5=01(cr) or *[aa]S5=01(cr)
This is the RS485 address of the instrument; any 2 digit address can be selected. These
digits can also contain the hexadecimal digits (A-F). AB is a valid address as is 0F. The
default address when an instrument is first shipped by Hastings is 61. An instrument
will always respond to a command sent to address FF.
There is a jumper on the processor board which will force the instrument to use an
address of 99 while the jumper is active (over two pins). This will allow the user to
establish communications when the address is unknown. A different address can be
selected with this S5 command and the instrument will return to this address when the
jumper is removed.
item 6 :active gas inst:
read S6(cr) or *[aa]S6(cr)
Sample reply: 0(cr)>
write S6=1(cr) or *[aa]S6=1(cr)
This number reports which of the 10 available gas calibration records is currently
active. Values from 0 – 9 are acceptable. Each gas record contains the conversion
factors to change the measured flow rate from the flow units used internally to the
engineering units desired by the customer. These are variables such as the reference
temperature, volumetric or mass unit, time units, or flowing gas. If these are not filled
out in the active record, then the flow meter will not be able to respond to a flow rate
command.
A flow meter will have at least one record completed by Hastings when the instrument
is shipped. Multiple records may be completed if calibrations for multiple gases or for
different ranges or reference temperatures were ordered. Customers may create new
records if desired. See the section on the gas list for information on each of the
variables. The default gas record is 0.
item 7 :flow alarm enable:
read S7(cr) or *[aa]S7(cr)
Sample reply: 1(cr)>
write S7=1(cr) or *[aa]S7=1(cr)
This is a binary value that when enabled it will allow flow values that exceed alarm
limits for a time longer than specified by the flow alarm delay to set bit 15 or bit 14 of
the alarm status word. Setting this bit also sets the bit 15 of the MFM config word (S2).
item 8 :flow alarm delay:
read S8(cr) or *[aa]S8(cr)
Sample reply: 0 S(cr)>
write S8=1.0(cr) or *[aa]S8=1.0(cr)
This defines the length of time in seconds between the start of an error condition until
the time it is reported by the alarm status word. A setting of 0.00 will result in an
immediate response.