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4
Safety Precautions (continued)
•
Precaution for operation
DANGER
1. Configure an emergency-stop circuit, interlock circuit, and/or other similar safety
circuits outside the PC and DN211.
If the PC or DN211 gets failed or malfunctioned, it can cause an accident which will
lead to bodily injury and/or mechanical damage.
T2/T2E/T2N User’s Manuals
3. Preparation for Operation
(hardware)
CAUTION
2. Secure the safe environment before executing program modification, forcible output,
RUN, or HALT instruction during operation. An operational mistake can cause
mechanical damage or accident.
T2/T2E/T2N User’s Manuals
3. Preparation for Operation
(hardware)
•
DIP switch for setting the operating mode/communication rate
CAUTION
1. Set and keep "OSEN" on the DIP switch to OFF. Setting it to ON can get failed or
malfunctioned.
2. When you set "BUSOFF" on the DIP switch to OFF, transmission will restart
automatically even when busoff occurs. Unless the cause of the DN211's busoff
(cause of communication error) is solved, however, busoff may get repeated.
3. When you set both of communication rate DR0 and DR1 to ON and turn on the power
of the T2/T2E/T2N, "Communication Rate Setting Failed" will appear with the
following indications:
• The "MS" LED is blinking red.
• "F7" and the local station node address are being displayed alternately on the
7-segment LED.
To clear these indications, set DR0 and DR1 correctly and, issue a reset request or
turn OFF and ON the power.
4. Set the communication rates of your nodes being connected to the network, to the
same communication rate. Setting different communication rates on your
different nodes will cause slave devices or the DN211 to get malfunctioned,
resulting in no communication started.
Read the relevant manuals and descriptions to set the communication rate of your
slave devices.
5. Don't change over the communication rates while your T2/T2E/T2N is rising just after
the turning on power. In particular, never change the communication rate while
communicating with slave devices. Failing to do so will cause "Communication Rate
Setting Failed" to appear.
To clear this indication, set the DIP switch to the correct setting and, issue a reset
request or turn OFF and ON the power.
3.2.1 DIP Switch for Setting the Operation Mode/Communication Rate