Rockwell Automation Publication 2080-UM004C-EN-E - March 2015
45
DeviceNet Plug-in – 2080-DNET20
Appendix
5
Calculate Voltage Requirement
SUM {[(Ln * (Rc)) + (Nt * (0.005))] * In} < 4.65 V
Where:
Ln = Length in meter or feet
Rc = Resistance of the cable per meter or feet
(Kwiklink flat media = 0.019 ohms/meter or 0.0058/feet)
Nt = Number of the node starting from 1 close to power supply and increasing.
0.005 = Nominal contact resistance used for every connection to the trunkline
In = Current drawn from the cable system by the device.
User Defined
Function Blocks
Download the following 2080-DNET20 user-defined function blocks from the
Sample Code Library:
http://www.rockwellautomation.com/go/scmicro800
RA_DNET_MASTER
This UDFB sets the 2080-DNET20 scanner to RUN mode.
IMPORTANT
To calculate for percentage of loading, divide the total voltage
calculated from the above formula by 4.65.
RA_DNET_MASTER: Input and Output Parameters
Variable Name
Type
Data Type
Description
FBEN
INPUT
BOOL
TRUE: To continue reading and writing
the scanner status. FBEN changed to
level Triggered.
SlotID
INPUT
UINT
Plug-in slot number (1…5)
Run
INPUT
BOOL
TRUE: Set the scanner to RUN mode.
FALSE: Scanner is in IDLE mode.
AutoScan is enabled.
AutoScan
INPUT
BOOL
TRUE: AutoScan is enabled.
ClearFault
INPUT
BOOL
TRUE: Clear scanner fault.
FALSE: No action.
FBENO
OUTPUT
BOOL
Function block enable output.
TRUE upon exit.
NodeAddress
OUTPUT
USINT
Scanner node address. Default node
address is 0.
BaudRate
OUTPUT
USINT
Network baud rate:
0: 125K
1: 250K
2: 500K
3: AutoBaud
Default baud rate is 500K.
Status
OUTPUT
USINT
Scanner fault status.
0: No error.
FBEN
S
lotID
Run
FBENO
RA_DNET_MA
S
TER
NodeAddress
BaudRate
S
tatus
Error
ActiveNodes
S
canList0_62
Auto
S
can
ClearFault
Содержание 2080-DNET20
Страница 8: ...viii Rockwell Automation Publication 2080 UM004C EN E March 2015 Table of Contents Notes ...
Страница 14: ...6 Rockwell Automation Publication 2080 UM004C EN E March 2015 Chapter 1 Micro800 Plug in Modules Notes ...
Страница 26: ...18 Rockwell Automation Publication 2080 UM004C EN E March 2015 Chapter 2 Install and Wire Your Module Notes ...
Страница 86: ...78 Rockwell Automation Publication 2080 UM004C EN E March 2015 Appendix A Specifications Notes ...
Страница 112: ...104 Rockwell Automation Publication 2080 UM004C EN E March 2015 Appendix B Quickstart Notes ...
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