Toshiba E3 Manual page 22

AO #10 ..Accesses the EIII's process (PID) deviation upper limit parameter (PvUL in
Gr. F b).
AO #11 ..Accesses the EIII's process (PID) deviation lower limit parameter (PvLL in
Gr. F b).
AO #12 and AO #13......The N2 interface provides a configurable "loss of
communications" timer function, which can detect communication losses
and perform certain actions if a valid N2 packet is not received and
processed within a set time period.
AO #12 sets the loss of communication time value (adjustable from 100ms
to 60.000s in 1ms increments, factory setting = 1.000s). If a valid (error-free)
N2 reception-response cycle does not take place within this time limit, the
timer will expire. If the timer expires, 5 possible actions can occur, as set by
the value AO #13 (loss of communications timeout action):
AO #13
Setting
0 (default)
1
2
3
4
Setting 0 is the default setting; when a communications timeout occurs, no
action will be taken (function is disabled).
For setting 1 (flash "t" on LED display only), this condition will continue until
the next error-free N2 packet is received and responded to. The warning
condition will then be removed and the timer value reset.
For setting 2 (flash "t" on LED display, stop inverter with decelerated stop),
the "t" warning will act as described in setting 1, but BO #1 (run/stop
command) will also be set to 0 (stop). Note that the inverter stop condition
will not be reset when an error-free N2 network packet is once again
received and responded to. Note that although BO #1 is set to 0, this will
cause the EIII to actually stop only if AO #5 or parameter command mode
selection (CMOd in Gr. U t) is set to 3 (communication interface input valid).
The EIII will then remain stopped until commanded otherwise by the NCU.
Setting 3 does not depend on the command mode selection (AO #5 or CMOd
in Gr. U t) or frequency mode selection (AO #6 or FMOd in Gr. U t) parameters.
Note that the "Err8" (communication interface card error) fault can only be
cleared locally at the inverter.
Setting 4 will cause the Metasys N2 interface to automatically change the
option frequency command (AO #1) to 400.00Hz upon a timeout occurrence.
Action Taken Upon Timeout
No action: ignore timeout.
Flash "t" (communications warning indicator) on LED display
only.
Flash "t" on LED display, stop EIII with decelerated stop.
Trip "Err8" (communication interface card error). Note that the
EIII must be reset locally in this case.
Flash "t" on LED display, set AO #1 (frequency command) to
400.00Hz (CAUTION!). Note that the actual internal frequency
command will be limited by the upper limit frequency
(parameter UL in Gr.F).
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