Bacharach GDA-1600, Instructions Manual

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GDA-1600 16-Channel Controller Instruction 5700-9001
16
Figure 3.4 – Input Data Sources
3.2.4.1 Min / Max Raw Counts Menus
Entries Description
Min Raw
The Minimum and Maximum Raw count entries, included in Input Data from menus,
define the range of input counts that provide
Measurement Range
read-out values
described in section 3.2.6.2 (on page 19). This menu entry is determined by the A/D
converter resolution of the channel’s input. For example, if the input is a 10 bit
Modbus® device with zero at 200 counts and 100% at 1000 counts, then this menu’s
MIN should be set at 200 and MAX at 1000. If communicating with the GDA-1600’s
optional 12-bit Analog Input PCB, the MIN should be 800 and the MAX should be
4000.
If the input device’s resolution is unknown, the live counts variable on the bottom of
the screen displays the actual raw A/D counts currently being read by this channel.
This reading may be used to test the input device for what A/D counts are provided
for zero and 100% if these values are unknown. Forcing the input device to read
zero should provide the A/D counts value needed to make this channel’s display also
read zero. Likewise, forcing the input device to read 100% should provide the A/D
counts value needed to make the GDA-1600 channel’s display also read 100%.
If Modbus 32 BIT is selected, a Byte Order entry appears at the bottom of the menu.
This determines WORD and BYTE alignment of data at the remote Modbus
transmitter when sending its 4 byte IEEE Floating Point values. With the pointer on
this entry, the EDIT key toggles between the 4 possible modes. Min / Max Raw
values are not used in this mode.
Max Raw
NOTE:
Each
Data From
: item has a matching default
Min/Max counts
value of 20% to
100% with ± 5% over/under range applied. If the default value is incorrect for
the input device it should be edited.