Ver 2.10
5-5
Section
DeviceNet (CompoBus/D) Memory Switch Settings
62
Make the following settings in the DeviceNet Interface Unit’s system menu to
use the PT as a Slave in DeviceNet remote I/O communications.
Item
Function
Settings
Default
Comm. Speed
Sets the speed used for communications with the
DeviceNet Master.
125, 250, or 500 kbps
125 kbps
Self-node No.
Sets the PT’s node number as a DeviceNet Slave.
0 to 63
63
Strobe ON Time
Sets the ON time of the strobes that indicate a change in
the PT’s status. The strobes include the screen change
strobe, numeral input strobe, and character string input
strobe. (The strobe ON time is set in ms.)
30 to 100 ms
30
OUT Area Head
Sets the leading address of the PT’s output area allocated
in PT memory when used as a DeviceNet Slave.
PM0000 to PM9999
PM0000
OUT Area Size
Sets the size of the PT’s output area when used as a
DeviceNet Slave. (The area size is set in words.)
0 to 32 words
32
IN Area Head
Sets the leading address of the PT’s input area allocated in
PT memory when used as a DeviceNet Slave.
PM0000 to PM9999
PM0032
IN Area Size
Sets the size of the PT’s input area when used as a
DeviceNet Slave. (The area size is set in words.)
0 to 32 words
32
This section only explains how to make these settings. For more details, refer to
6-1 Overview of Remote I/O Communications.
Note Set all of the nodes in the DeviceNet network (Masters and Slaves) to the same
communications speed. Setting a different communications speed in a Slave
won’t only disable communications with that Slave, it can also cause commu-
nications errors between nodes that are set to the correct communications
speed.
Reference 1. If the node number setting is identical to the node number set on another
node in the network, a node number duplication error will occur and the PT
won’t participate in network communications.
2. Always set the strobe ON time longer than the instruction-execution cycle
time of the PC in which the Master is mounted. If the strobe ON time is short-
er than the Master PC’s cycle time, the Master PC may not recognize the
strobe signal.
3. If possible, include the PT status notify area within the input area.
4. If possible, include the PT status control area within the output area.
5. The settings for the output area size and input area size determine the sizes
of the PT’s output area and input area when it is used as a Slave.
Use the following operation in the system menu to set the CompoBus/D memory
switches.
Press Maintenance Mode.
Making Settings
