6-5
I/O Allocation Section 4-2
Remote I/O Com-
munications
4-2-5 Input Data
The input data specific to Digital Indicators with DeviceNet communications
that is not allocated in the variable area of the K3HB-DRT is described here.
General Status
• The Communications Power Voltage Monitor Error Flag indicates the sta-
tus of the power being supplied through the DeviceNet communications
cable.
• The Unit Maintenance Flag is set to 1 when the Unit conduction time of
the K3HB-DRT Digital Indicator exceeds the monitor value.
4-2-6 Output Data
Output data specific to DeviceNet that is not allocated to the K3HB-DRT vari-
able area is described here.
Output Enable Bits Output Enable Bits are used when settings are written to the OUT Area, e.g.,
when comparative set values are set or RUN/STOP is executed using opera-
tion commands. The area for Output Enable Bits is always allocated in the first
word of the OUT Area.
When Output Enable Bits are set to 0 (OFF), the settings and bits set in the
OUT Area are not transmitted and, therefore, nothing is executed. The set-
tings can be executed by setting the Output Enable Bits to 1 (ON). Writing is
not executed if the Output Enable Bits are not set to 1.
Setting Output Enable Bits prevents unintentional setting changes and
enables various settings in the OUT Area to be enabled simultaneously. For
example, a new value may written to a word for which a SP has already been
set. If the Output Enable Bits are set to 1 and then set to 0, no SP will be writ-
ten even if one is accidentally allocated. (However, care must be taken
because writing is enabled if Output Enable Bits are set to 1.)
Furthermore, if set values are written for all the words and the Output Enable
Bits are set to 1, the set values will all be enabled at once.
Note When Output Enable Bits are set to 1, data allocated to the OUT Area is writ-
ten whenever it changes.
Bit 76543210
010 00
K3HB-DRT Unit Maintenance Flag
0: Within range (less than monitor value)
1: Outside range (monitor value or higher)
Communications Power Voltage
Monitor Error Flag
0: Normal (higher than monitor value)
1: Error (monitor value or lower)
Not used.
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