Oldham WX16, Руководство пользователя

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WX16 User Manual | 15
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 WX16 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.
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.
2.2.4b Marker Menus
Some transmitters or monitoring devices providing WX16 inputs also indicate special
modes of operation, such as
Calibration, Maintenance or Fault, by transmitting a
special <4mA or negative “Marker” value. The WX16 offers channel Marker menus for
detecting and indicating such events (see Figure 2.5). While active, the WX16 displays
a 6-digit ASCII message to indicate the special event, and if equipped with 10-0167 4-
20mA output option, the WX16 also transmits the same <4mA value.
•
Marker Enabled turns the marker feature ON and OFF
•
The negative Marker value is entered into the Marker % field as a negative
percent of full scale. For example, -15.62% of full scale detects a marker value of
1.5mA (1.5mA is -15.62% of full scale when 4-20mA is the range).
•
The Mark As menu allows user entry of the 6-digit ASCII message to be displayed
when the marker is detected.
Figure 2.5
2.2.4c Sensor Life Detection
Sensor Life should only be activated when the Marker event is Calibration and when a
sensor life value is transmitted after each calibration. This feature is provided primarily
for use when interfacing the WX16 to Oldham’s OLCT 200 Transmitters, which may be