Dn311 Operation Modes - Toshiba V Series Manual

Chapter 4 Operating Procedures for the DN311 (Software)
4.3.1

DN311 operation modes

4
68
The DN311 has the following operation modes:
(1) Initialize mode
• The DN311 is in the process of resetting after power is turned on or reset is
requested.
• The DN311 is set in standby mode when the reset processing is completed nor-
mally.
• The DN311 is set in down mode when the reset processing fails to be completed
normally (e.g. when an error occurs in a self-test).
• Don't issue instructions from the S controller user program during initialize mode.
(2) Standby mode
• The DN311 is set in this mode when the reset processing is completed normally
after power is turned on or reset is requested.
• An operation mode control request can changes run mode to standby mode.
• Only this mode allows you to set the parameters of the local node and slave
devices in the DN311.
• Unless the parameters of the local node are set, no change can be made from
standby mode to run mode.
(3) Run mode
• After the parameters of the local node are set, the DN311 can be set in run mode
by an operation mode control request.
• This mode allows the DN311 to transmit to salve devices.
• This mode allows you to select polling mode or bit strobe mode for transmission to
slave devices.
• This mode allows you to select synchronous mode or asynchronous mode for
transfer between the S controller and the DN311.
(4) Down mode
• Indicates that the DN311 is in an irrecoverable abnormal state.
• A reset request can change it to standby mode. If a reset request results in an
error response, reset the DN311 by turning power off and back on.
• See Table 4-4 Down Information for the possible causes of down mode.
Figure 4-16 shows how the DN311 changes from one operation mode to another. The
boxes indicate the operation modes of the DN311. The operation modes in the boxes of
thick lines can be controlled by the user program. The thick arrows indicate the requests
that the user program can specify.
Power down
Initialize
Self-check error
end
Down
• If the S controller falls in HALT/ERROR mode, the DN311 in run mode is set in standby mode.
Power turned on
Self-check normal end
Reset request
Reset request
Reset request
or
power turned
Run request
back on
Irrecoverable error
Caution
model 3000 DeviceNet Module Manual (DN311/DN311A)
Standby
a) Standby request
b) S controller:
RUN → HALT
c) Busoff occurred:
DIP switch
BUSOFF on the
front panel at ON
Run (Transmission possible)