Toshiba E3, Manual

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15
8. Network Programming Interface
8.1 Object Summaries
The EIII Metasys N2 bus interface has a predefined set of analog and binary I/O points
used for controlling the inverter and for monitoring status items. These points can be
summarized as follows:
•
Analog input (AI) points are used for monitoring inverter status items such as
output frequency, current and voltage. The EIII supports 16 different analog input
points. All analog input points support low alarm limits, low warning limits, high
warning limits, high alarm limits and differential values. Change of state (COS),
alarm and warning functions can also be enabled. Analog input points will accept
override commands, but will not change their actual values or indicate override
active.
•
Analog output (AO) points are used for setting and monitoring control points such
as the inverter’s frequency command and configuration parameters. The EIII
supports 13 different analog output points. The values of all analog output points
can be modified by issuing override commands. Issuing release commands will
not cause the analog output points to automatically return to their pre-override
values, nor will the analog output points automatically return to their pre-override
values after a certain time period of no communication. COS is not supported for
AO points.
•
Binary input (BI) points are used for monitoring inverter status items such as
terminal ON/OFF conditions and fault status. The EIII supports 19 different binary
input points. All binary input points support COS, alarm enabling and normal/alarm
status indications. Binary input points will accept override commands, but will not
change their actual values or indicate override active.
•
Binary output (BO) points are used for executing inverter commands such as
RUN/STOP and trip clear. The EIII supports 10 different binary output points. The
values of all binary output points can be modified by issuing override commands.
Issuing release commands will not cause the binary output points to automatically
return to their pre-override values, nor will the binary output points automatically
return to their pre-override values after a certain time period of no communication.
COS is not supported for BO points.
The device type for the EIII N2 interface is VND. To simplify the definition of points for
a Johnson Controls network control unit (NCU), a Data Definition Language (DDL) file
is included in section 10 of this manual.