Fieldbus coupler/controller |
• 33 |
Fieldbus controller 750-819 |
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3.2.3 Hardware
3.2.3.1 View
Fieldbus connection Series 231 (MCS)
Address
Address
Configuration and programming interface
9 |
0 |
1 |
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8 |
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7 |
3 |
6 |
4 |
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5 |
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9 |
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8 |
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7 |
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6 |
4 |
5 |
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LonWorks
SERVICE
STATUS
ICOM
I/O
USR
7 50-819
flap opened
01 |
02 |
A |
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C |
B |
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D |
24V |
0V |
+ |
+ |
- |
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Status voltage supply
-Power jumper contacts -System
Data contacts
Supply 24V 0V
Supply via power jumper contacts
24V
0V
Power jumper
contacts
operating mode switch
Fig. 3-8: Fieldbus controller 750-819 LON |
g081900e |
The fieldbus coupler comprises of:
•Supply module with Internal system supply module for the system supply as well as power jumper contacts for the field supply via I/O module assemblies.
•Fieldbus interface with the bus connection
•Display elements (LED's) for status display of the operation, the bus communication, the operating voltages as well as for fault messages and diagnosis
•Encoder switch for logical node address
•Service-Pin
•Configuration and programming interface and operating mode switch
•Electronics for communication with the I/O modules (internal bus) and the fieldbus interface
Modular I/O System
LONWORKS®
34 • Fieldbus coupler/controller Fieldbus controller 750-819
3.2.3.2 Device supply
The supply is via fed in terminal blocks with CAGE CLAMP® connection. Device supply is intended for system supply and field side supply.
FiELDBUSINTERFACE |
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ELECTRONIC |
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24V |
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1 |
5 |
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DC |
I/O |
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24V / 0V |
10nF |
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DC |
MODULES |
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0V |
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2 |
6 |
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24V |
24V |
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FiELDBUS INTERFACE |
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ELECTRONIC |
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3 |
7 |
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0V |
0V |
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10nF |
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4 8
750-819
Fig. 3-9: Device supply |
g081901e |
The integrated internal system supply module generates the necessary voltage to supply the electronics and the connected I/O modules.
3.2.3.3 Fieldbus connection
For the field bus connection, the LON interface is equipped with a 2 pole header, series 231 (MCS). The scope of delivery includes the plug connector 231-302.
Bus cable connection is made isolated from the system. The data decoding method makes it independent of the polarity.
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Fig. 3-3: Fieldbus connection, series 231 (MCS) |
g012735x |
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The connection point is mechanically lowered allowing the installation in a 80 mm deep switch box once the plug is connected.
The connecting cable Twisted Pair is recommended for the FTT-10-Tranceiver (Free-Topology Transceiver) in the LON coupler.
More information
i You can find detailled information on more cable types in Chapter 5.3.5 „Cable specification“.
Modular I/O System
LONWORKS®
Fieldbus coupler/controller |
• 35 |
Fieldbus controller 750-819 |
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3.2.3.4 Display elements
The operating condition of the fieldbus coupler or node is signalled via light diodes (LED).
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LonWorks |
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02 |
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A |
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C |
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C |
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SERVICE |
B |
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D |
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A |
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STATUS |
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24V |
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0V |
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ICOM |
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I/O |
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+ |
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USR |
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Fig. 3-10: Display elements 750-819 |
g081902x |
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LED |
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Color |
Meaning |
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SERVICE |
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green |
The 'SERVICE'-LED indicates the status of the Neuron application. |
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STATUS |
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red |
The 'STATUS'-LED visualizes error states and wink tasks. |
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ICOM |
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green |
The 'ICOM'-LED indicates the internal communication between |
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Neuron-Chip and µC 165. |
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IO |
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red /green |
The ‚I/O‘-LED indicates the operation of the node and signals faults |
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/ orange |
encountered. |
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USR |
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red /green |
The 'USR' LED can be selected by a user program in a programma- |
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/ orange |
ble fieldbus controller. |
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A |
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green |
Status of the operating voltage system |
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C |
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green |
Status of the operating voltage – power jumper contacts |
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3.2.3.5 Configuration and programming interface
The configuration and programming interface is located behind the cover flap. This is used to communicate with WAGO-I/O-CHECK and WAGO-I/O-PRO 32 as well as for firmware transfer.
open flap
Configuration and programming interface
Fig. 3-11: Configuration and programming interface |
g01xx07e |
The communication cable (750-920) is connected to the 4 pole header.
Modular I/O System
LONWORKS®
36 • Fieldbus coupler/controller Fieldbus controller 750-819
3.2.3.6 Operating mode switch
The operating mode switch is located behind the cover flap beside the configuration and programming interface.
open |
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flap |
RUN |
STOP |
RESET |
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(depress) |
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UPDATE FIRMWARE |
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Mode switch |
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Fig. 3-12: Operating mode switch |
g01xx08e |
The switch is a push/slide switch with 3 settings and a hold-to-run function.
Operating mode switch |
Function |
From middle to top position |
Activate program processing (RUN) |
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From top to middle position |
Stop program processing (STOP) |
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Lower position, bootstrap |
For original loading of firmware, |
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not necessary for user |
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Push down |
Hardware reset |
(i.e.with a screwdriver) |
All outputs are reset; variables are set to 0 or to FALSE |
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or to an initial value. |
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The hardware reset can be performed with STOP as well |
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as RUN in any position of the operating mode switch! |
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An operating mode is internally changed at the end of a PLC cycle.
Attention
If outputs are set when switching over the operating mode switch from RUN to STOP, they remain set! Switching off the software side i.e. by initiators, are ineffective, because the program is no longer processed.
Note
With "GET_STOP_VALUE" (library "System.lib") WAGO-I/O-PRO 32 provides a function which serves to recognize the last cycle prior to a program stop giving the user the possibility to program the behavior of the controller in case of a STOP. With the aid of this function the controller outputs can be switched to a safe condition.
Modular I/O System
LONWORKS®