Structure Of The Valve Driver Data; Process Data - Aventics DeviceNet Description Du Système Et Notice D'emploi

94 AVENTICS | Bus Coupler AES/Valve Driver AV, DeviceNet | R412018138–BAL–001–AC

Structure of the Valve Driver Data

Table 16: Valve driver board, 2x
Output byte Bit 7
Valve designation
Solenoid designation
1)
Bits that are marked with a "–" may not be used and are assigned the value "0".
6 Structure of the Valve Driver Data
6.1

Process data

Incorrect data assignment!
Danger caused by uncontrolled movement of the system.
Always set the unused bits to the value "0".
The valve driver board receives output data from the controller with nominal values for the position
of the valve solenoid coils. The valve driver translates this data into the voltage required to actuate
the valves. The length of the output data is 8 bits. Of these, 4 bits are used with a 2x valve driver
board, 6 bits with a 3x valve driver board, and 8 bits with a 4x valve driver board.
Fig. 4 shows how valve positions are assigned on 2x, 3x, and 4x valve driver boards:
Fig. 4: Valve position assignment
 Valve position 1
 Valve position 2
 Valve position 3
 Valve position 4
20 Base plate, 2x
21 Base plate, 3x
The symbols for the valve zone components are explained in section 12.2 "Valve zone"
on page 107.
The assignment of valve solenoid coils to bits is as follows:
1)
Bit 6
– –
– –
22
20
Bit 5 Bit 4
– –
– –
WARNING
23
21
22 Valve driver board, 2x
23 Valve driver board, 3x
24 Valve driver board, 4x
Bit 3 Bit 2
Valve 2 Valve 2
Sol. 12 Sol. 14
24
20
Bit 1 Bit 0
Valve 1 Valve 1
Sol. 12 Sol. 14