Setup guide

Chapter 2 System Objects
Object Reference Manual 3-62 www.Automationdirect.com
CommFail logical yes no Driver-generated signal that is ON if
LookoutDirect
cannot communicate
with the device for whatever reason
D400001 – D465000 numeric yes yes 6-digit addresses of 32-bit unsigned
holding register—reads two adjacent
holding registers as a single 32-bit
number ranging from 0 to
4,294,967,296.
D40001 – D49999 numeric yes yes 32-bit unsigned holding
register—reads two adjacent holding
registers as a single 32-bit number
ranging from 0 to 4,294,967,296.
Exceptions numeric yes no Number of responses from device
whose message was understandable
to the driver but included an error
code indication from the device
F400001 – F465000 numeric yes yes 6-digit addresses of 32-bit IEEE
floating point register—reads two
adjacent holding registers as a single
32-bit floating point value
F40001 – F49999 numeric yes yes 32-bit IEEE floating point
register—reads two adjacent holding
registers as a single 32-bit floating
point value
Garbled numeric yes no Number of responses from device
whose message was unintelligible to
the driver
NoResponse numeric yes no Number of polls generated by driver
not responded to by device
OffHook logical no yes When TRUE, this flag instructs the
Modbus object to retain exclusive use
of its assigned communication port
Poll logical no yes When this expression transitions
from FALSE to TRUE,
Lookout
Direct
polls the device.
Table 3-12. Modbus Data Members (Continued)
Data Member Type Read Write Description