![IDEC OpenNet series Скачать руководство пользователя страница 359](http://html.mh-extra.com/html/idec/opennet-series/opennet-series_user-manual_617384359.webp)
25: D
EVICE
N
ET
S
LAVE
M
ODULE
25-10
O
PEN
N
ET
C
ONTROLLER
U
SER
’
S
M
ANUAL
Transmission Time
The response time of the DeviceNet network varies greatly depending on factors such as the quantity of nodes, data bytes,
and DeviceNet system setup. To determine the accurate response time, confirm the response time on the actual network
system.
The following example describes a response time in a DeviceNet network system comprised of IDEC SX5D communica-
tion I/O terminals.
Example: DeviceNet Transmission Time
•
System Setup
PLC:
1747-L532 (SLC5/03 CPU made by Rockwell Automation)
Master:
1747-SDN (SLC500 DeviceNet Scanner Module made by Rockwell Automation)
Slaves:
SX5D-SBM16K (8pt transistor source input / 8pt transistor sink output)
SX5D-SBM16P (8pt transistor sink input / 8pt transistor protect source output)
SX5D-SBR08 (8pt relay output)
Data Rate:
125k baud
Operation Mode: Communication according to the scan list in the master
•
System Operation (Data Flow)
(1) SX5D-SBM16K sends 8-input data to the master, and the master sends 8-output data to SX5D-SBM16K.
(2) SX5D-SBM16P sends 8-input data to the master, and the master sends 8-output data to SX5D-SBM16P.
(3) SX5D-SBM16K sends 8-input data to the master, and the master sends 8-output data to SX5D-SBR08.
•
Calculating the Response Time
Response time = Input processing time (slave) + Communication time (slave to master) + Data processing time (master
and PLC) + Communication time (master to slave) + Output processing time (slave)
•
Measured Value of Response Time
SX5D-SBM16K Input ON/OFF
→
SX5D-SBM16K Output ON/OFF response time = Approx. 18 msec
DeviceNet
STATUS
MODULE NET
ADDRESS/ERROR
Power Supply Module
Node 1 (MAC ID = 1)
Node 0 (MAC ID = 0)
POW
MNS
I O
SX5D
Device
Net
SX5D-SBM16K
DeviceNet Network
DeviceNet Master
(1747-SDN)
Node 2 (MAC ID = 2)
POW
MNS
I O
SX5D
Device
Net
SX5D-SBM16P
Node 3 (MAC ID = 3)
POW
MNS
I O
SX5D
Device
Net
SX5D-SBR08
PLC (1747-L532)
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]