User`s manual

DeviceNet (Master) Function
8-11
8
33
33
3 Communication monitor time
The communication monitor time (ISD, EPR) refers to the time out time for communication.
Select "Normal mode" or "Long mode."
- When "fixed allocation" is selected, the communication monitor time will be as shown above,
according to the number of slave modules.
- When "free allocation" is selected, ISD/EPR in the system memory can be set to any value
(2ms to 65534ms / 4ms to 65532ms). => See page 8-15.
- The communication time can be measured using a DeviceNet analyzer, which is commercially
available.
ISD (InterScan Delay)
The ISD is the communication monitor time allowed after the master module sends a request
to a slave module until it receives a response from the last slave module.
When the time allowed for the ISD has elapsed without a response from the last slave, the
JW-32CUM1 advances to the next communication cycle.
EPR (Expected Packet Rate)
The EPR is the communication monitor time allowed after a master module sends a request
to a slave module until it receives a response from all of the slave modules.
If one or more of the slave modules fails to return a response within the time allowed, a
communication error occurs.
44
44
4 SCAN switch
When the switch SW8 is set to "not protected" or a "Busoff" error occurs, keep press the SCAN
switch for three seconds, the JW-32CUM1 executes the following procedures.
- When the "Busoff" error occurs (error code F1 displays) on the JW-32CUM1, there is a fault on
the communication. In this case, turn OFF/ON the PLC power or keep pressing the SCAN
switch for longer than three seconds regardless of the settings of the protect, the JW-32CUM1
is shut off connection, and is issued connection again. If there is no problem on the
communication, the JW-32CUM1 can communicate normally.
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DSI RPE DSI RPE
51ot104
0001
08
0051
13ot6106021
74ot2308061
36ot84001002
When used in the master mode When used in the slave mode
Re-reading settings of the switches and
system memory
Re-reading settings of the switches and
system memory(If there is no error)
Edit the scan list
PG/COMM1
PG/COMM2
JW-32CUM1
L1
L2
SHLD
FG
DN - MCM - MCU
FLT
CM1
CM2
SCAN
OFF
OFF
ON
ON
LT
PULL
PROTECT
SCAN switch
- For details about editing the scan list, see page 8-28.