KEYENCE DL-PD1 - Manual (Page 30)

3-6 - PROFIBUS DP Compatible Network Unit DL-PD1 User's Manual (GT2) -
Execu
ting Communi
cat
ion
3
3-2
Hardware configuration
Set the hardware configuration on the configuration software of PROFIBUS DP
according to the physical configuration of the DL-PD1 and sensor amplifier connected to
the DL-PD1. The setting procedure differs depending on the operation mode of DL-PD1.
Operation mode of DL-PD1
There are two types of operation modes for DL-PD1. The operation modes for DL-PD1
are switched on the hardware configuration using the configuration software of
PROFIBUS DP.
 Monitor mode
Use this mode to obtain the comparator value and status of sensor amplifiers via cyclic
communication. The input size and output size for cyclic communication change
depending on the number of sensor amplifiers connected. The maximum sizes for input
and output are 107 bytes and 16 bytes respectively.
When using the monitor mode, assign the "DL-PD1" and each sensor amplifier to the
PROFIBUS DP system on the hardware configuration.
When using the master compatible with the DP-V1, any of the modes can be used to
read or write all information on the sensor amplifier via acyclic communication of DP-V1
service.
* When using Class 2 master only
Cannot be used with Class 1 master.
"DP-V1 Service" (page 3-26)
 I/O mode
Use this mode to reduce the input/output size of cyclic communication to minimum. The
input size and output size are 10 bytes each regardless of the number of sensor
amplifiers connected. Using the cyclic communication, the control output of sensor
amplifiers can be read and external output to sensor amplifiers can be performed.
When using the I/O mode, assign the "DL-PD1 without sensor amplifier" to the
PROFIBUS DP system on the hardware configuration. Do not assign the sensor
amplifier.
Unit assigned on the
configuration
Operation mode
of DL-PD1
Cyclic communication Acyclic
communication
(DP-V1 service) Control
output
Comparator
value
Error
information
External
input
DL-PD1 Monitor mode     
DL-PD1 (without Sensor
amplifier)
I/O mode    *