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36
Sect
ion 3
Dev
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Net
Co
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E3X-DRT21-S
User’s Manual
Section 3
Part Names
●
DIP switch
• Operating Mode Settings (SW1, SW2)
These switches set the operating mode. However, data type assigned to the master IN
area varies on the operating mode.For details, see “DeviceNet Remote I/O
Communications” on p. 40.
The Sensors that are allocated two unit numbers must be counted as two units when counting the
number of sensors.
• Reserved for system use (SW3, SW4)
These pins must always be OFF.
●
Sensor Reset Switch
Press this switch to reset power of connected sensors. Use this switch when the
following occurs:
• When the number of connected sensors doesn't match the number of sensors that
can be communicated, one or more sensors might have been released.If so, mount all
of the displaced sensors correctly, and then reset the power to establish
communications between sensors again. If the power is turned off, the communication
unit is released from DeviceNet, which might affect the entire system; by this switch,
reestablish communications between the sensors.
In E3X-DRT21-S, DeviceNet baud rate is automatically changed to baud rate of the master.
Therefore, the DIP switch is not required to set the baud rate.
1 2 3 4
ON
Operating mode (MODE0)
Operating mode (MODE1)
Reserved for system
SW1
(MODE0)
SW2
(MODE1)
Operating Mode Settings
Number of Sensors that Can
Be Connected
OFF
OFF
Remote I/O communications 1CH mode
Max. 13
ON
OFF
Remote I/O communications 2CH mode
Max. 16
OFF
ON
Remote I/O communications 2CH +
detection level monitor mode
Max. 16
ON
ON
Cannot be set.
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