Communication methods, Communication methods -16 – KEYENCE DL-DN1 User Manual
Page 46
3-2 I/O Communication
3-16
- DeviceNet Compatible Network Unit DL-DN1 User’s Manual (GT2) -
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The following describes how the DeviceNet master unit communicates with the DL-
DN1 (slave unit) using I/O communication (polling).
"Reading an output from a sensor amplifier" (page 3-16)
"Entering an external input into a sensor amplifier" (page 3-17)
"Reading comparator values (P.V. values) from sensor amplifiers" (page 3-18)
"Changing the Bank Number of Sensor Amplifiers" (page 3-19)
"Rewriting a Setting Value of a Sensor Amplifier" (page 3-20)
For the communication methods using explicit messaging, see
The button operation of the sensor amplifier is locked for approximately 10
seconds after the end of each of the operations listed below. The screen
displays "COM-Lock" for 2 seconds while switching to the locked state or
when button operation is attempted during the locked state. The screen
displays "COM-Unlock" for 2 seconds while unlocking. However, the initial-
ization screen appears when an initialization reset is executed. The initial-
ization screen remains displayed if any of the following operations is
repeated.
• External input
• Changing a bank
• Rewriting a setting value(s)
Reading an output from a sensor amplifier
Available outputs: HIGH, LOW, GO, HH, and LL
Device assignments:
This example reads the HIGH output from the sensor amplifier of ID01.
It assumes that the operating mode assigned to the device is 3-output mode.
(1) The output from the sensor amplifier is brought into the IN area by I/O
communication.
When using HH output or LL output, set the "special output setting"
of the sensor amplifier to "5-output."
Communication Methods
Reference
PLC
Output of sensor amplifier
IN area [n+1]Bit0
Sensor amplifier
(1)
Output
HIGH output of ID 01
1
0
ON
OFF
Point