Burkert Type 8695 - Manual (Page 52)

52
DeviceNetinstallation
11.11 configuration of the safety position of pilot valves
for bus error
If a bus fault occurs, the bus LED may assume the “Green flashing”, “Red flashing” or “Red” status.
(For a description see “Status of the bus LED”, page 57)
The valve safety position and safety module attributes can be used to configure the pilot valve in the event of a bus fault.
If a bus fault occurs, the configuration data of the pilot valves can be accessed acyclically via Explicit Messages.
• The Get_Attribute_Single service stands for a read access of the configuration data.
• The Set_Attribute_Single service stands for a write access of the configuration data.
1 data byte for safety mode:
(Attribute address: class 150, instance 1, attri-
butes 7) 1 data byte for valve safety position:
(Attribute address: class 150, instance 1, attributes 6)
Bit mode Value assignment Bit solenoid valve Value assignment
Bit 0
Character-
istics in event
of bus fault 0 Output safety position
1 Retain last valve
position
Bit 0
Y1
(Pilot valve 1) 0 Pilot valve 1 OFF
1 Pilot valve 1 ON
Bit 1... not used 0 always
Bit
1...7
not used 0 always Bit 7
Table 19: data byte for safety mode Table 20: data byte for valve safety position
11.12 Teach function (calibrating the end position)
The teach function can be used to automatically determine and read in the end positions of the actuator.
For the bus variant DeviceNet, the teach function can also be started via the bus protocol (see “11.12.1
Starting the teach function”).
Danger!
risk of electric shock.
▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations for electrical equipment.
necessary requirements:
Before you can actuate the each function, you must
• mount the control head on the actuator,
• connect the supply voltage and
• connect the compressed-air supply.
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Type 8695