How it Works
Danfoss
Loading...
S7 PVE H Float
Operating guide [ar]
21 pgs3.06 Mb0
Table of contents
Loading...

Danfoss S7 PVE H Float Operating guide [ar]

User Manual
PLUS+1® Compliant
S7 PVE H Float Function Block
www.danfoss.com
User Manual
Revision history Table of revisions
Date Changed Rev
May 2018 Updated threshold graphic 0102
January 2018 First edition 0101
2 | © Danfoss | May 2018 AQ00000241en-000102
User Manual

Contents

S7_PVE_H_Float Function Block
Inputs....................................................................................................................................................................................................4
Function Block Parameter Values...............................................................................................................................................5
Outputs................................................................................................................................................................................................ 5
Function Block Connections.........................................................................................................................................................6
Threshold and Maximum Values................................................................................................................................................ 6
Status and Fault Logic.....................................................................................................................................................................7
Status Logic...................................................................................................................................................................................7
Fault Logic..................................................................................................................................................................................... 8
Power Two or More PVE-Type Valve Actuators from One DigOut................................................................................. 8
MC Controller Configurations......................................................................................................................................................9
Configure the MFIn for the Error_Pin Input.................................................................................................................... 10
Configure the DigAn for the Error_Pin Input..................................................................................................................10
Configure the MFOut for the Supply Output................................................................................................................. 11
Configure the DigOut for the Supply Output.................................................................................................................12
Configure the MFOut for the Block's Output..................................................................................................................13
SC Controller Configurations.....................................................................................................................................................13
How to Configure an MFIn for the Error_Pin Input...................................................................................................... 14
How to Configure a DigAn for the Error_Pin Input...................................................................................................... 15
How to Configure an MFOut for the Supply Output................................................................................................... 16
How to Configure a DigOut for the Supply Output..................................................................................................... 17
How to Configure an MFOut for the Block's Output....................................................................................................18
How to Configure an MFOut for the Float Output....................................................................................................... 19
How to Configure a DigOut for the Float Output......................................................................................................... 20
©
Danfoss | May 2018 AQ00000241en-000102 | 3
User Manual

S7_PVE_H_Float Function Block

This function block reports the feedback of Danfoss Series 7 valve actuators for valves configured for a float option.
You can move the main spool into its float position by powering a dedicated float pin.

Inputs

Inputs to the function block are described.
Item Type Range Description Enable BOOL —— Enables and disables the function block.
•
True—Enables the function block's Supply output and releases the block's Output from its neutral hold (5,000).
•
False— Disables the function block's Supply output and holds the block's Output at neutral (5,000).
•
False—The Output goes to 5,000.
Para Bus
Float_Fdbk Bus —— Reports the pin status of the PVE actuator's Float pin.
Fdbk Bus —— Input for the Status bus from the MFOut that reports the output status of the MFOut that receives the
Error_Pin Bus —— Input for a bus from an MFIn or DigAn with a DigIn signal from the valve actuator's Error_Pin.
Inputs: Thld_A— Threshold is the hydraulic deadband in the actuator. Applies to the A port. Thld_B—Threshold is the hydraulic deadband in the actuator. Applies to the B port. Fault Reaction—T Sets the output constantly in neutral if the Error_Pin goes high. F Does not change the output in case the Error_Pin goes high. SuppTimeAtNeut—Supply Time At Neutral: Sets time that the supply stays on after return to neutral. If
-1, then the supply is always on.
The function block uses this input to detect shorts on the PVE actuator's Float output.
function block's Output. (Each MFOut inside the Inputs page reports, through a Status bus, the state of a corresponding MFOut inside the Outputs page.)
•
On MC controllers, the Status bus inputs a PinStatus signal.
•
On SC controllers, the Status bus inputs a Status signal.
4 | © Danfoss | May 2018 AQ00000241en-000102
User Manual
S7_PVE_H_Float Function Block
Item Type Range Description Float_Cmd BOOL ——
Input S16 ±10,000 Command signal for the actuator spool.

Function Block Parameter Values

The function block's operating characteristics are set by para bus input signals. The following table describes the Para bus inputs signals.
Input Type Range Description Thld_A U16 0–10,000 The threshold is the hydraulic deadband in the actuator. Applies to the A port. Thld_B U16 FaultReaction BOOL T–F T—Sets the Output constantly in neutral if the Error_Pin goes high.
SuppTimeAtNeut S16
•
T—Requests the actuator spool to float. A true input:
Sets the function block's Float output to true.
‒
Immediately overrides any values at the function block's Input.
‒
•
F—Request control of the actuator through the function block's Output. A false input:
Sets the function block's Float output to false.
‒
+10,000—Commands the full travel of the actuator spool in Direction B.
•
0—Commands the actuator spool to its neutral position.
•
–10,000—Commands the full travel of the actuator spool in Direction A.
•
0–10,000
-1–30,000 Supply Time At Neutral controls the behavior of the function block's supply output. This
The threshold is the hydraulic deadband in the actuator. Applies to the B port.
F—Does not change the output in case the Error_Pin goes high.
parameter sets the amount of time that the supply stays on after return to neutral.
-1—The Supply is always on. 0–30,000—Sets the amount of time in milliseconds that the Supply output stays true after the function block's Output returns to neutral (5,000). 1,000 is 1,000 ms.

Outputs

Outputs of the function block are described.
Item Type Range Description Status U16 —— Reports the status of the function block.
See Status and Fault Logic for more about this output.
Fault U16 —— Reports the faults of the function block.
See Status and Fault Logic for more about this output.
Supply BOOL ——
SOS BOOL ——
•
True—The valve actuator under control of this function block requires power to its Supply pin.
•
False— The valve actuator under control of this function block does not require power to its Supply pin.
See Power Two or More PVE-Type Valve Actuators from One DigOut if you are powering more than one PVE-type valve from a single DigOut.
•
True— The function block detects no errors in the valve actuator wiring. Power can be shared between this and other actuators.
•
False— The function block detects an error in the valve actuator wiring. Power must not be applied to the actuator's Supply pin.
You do not need to connect this output when you control just one actuator. See Power Two or More PVE-Type Valve Actuators from One DigOut if you are powering more than one PVE-type valve from a single DigOut.
©
Danfoss | May 2018 AQ00000241en-000102 | 5
User Manual
S7_PVE_H_Float Function Block
Item Type Range Description Float BOOL —— Output to the actuator Float pin.
•
True— Allow actuator spool to float.
•
False—The function block's Output controls actuator spool position.
Output Bus —— Outputs a bus with OutputValue and DutyOut signals.
•
On MC controllers, the OutputValue signal proportionally commands the valve actuator.
•
On SC controllers, the DutyOut signal proportionally commands the valve actuator.

Function Block Connections

The connections that can be made with the function block are described.
S7 PVE H FLOAT Function Block Connections
Item Description 1 T—Enables the Supply output. Releases the Output from its neutral hold.
F—Disables the Supply output. Holds the Output at neutral. Parameters
2
Reports the status of the MFOut that receives the function block's Float output.
3 4 Reports the status of the MFOut that receives the function block's Output. 5 Input from the valve actuator's Error_Pin. Valve actuator faults set this pin to true.
Command signal to set the Float output.
6 7 Command signal for the actuator spool. 8 Reports the status of the function block. 9 Reports the faults of the function block. 10 True—Actuator spool is in a float state.
False—Sp_Pos output indicates the position of the actuator spool.
11 True—The function block detects no errors in the valve actuator wiring. Power can be shared between this and other actuators.
False—The function block detects an error in the valve actuator wiring. Power must not be applied to the actuator's Supply pin.
12 True— Allow actuator spool to float.
False—The function block's Output controls actuator spool position.
13 Commands the valve actuator.

Threshold and Maximum Values

Learn how the output of the function block is determined according to minimum, threshold and maximum values.
The function block outputs a bus with an OutputValue signal. This signal commands the valve actuator.
6 | © Danfoss | May 2018 AQ00000241en-000102
User Manual
S7_PVE_H_Float Function Block
The following illustration shows a plot of OutputValue signal between its minimum, threshold, and maximum values.
The range of the OutputValue is 5,000, going 2,500 above and 2,500 below a midpoint of 5,000.
•
In this plot, the Thld value is 10% of the 2,500 value (250).
•
As soon as the Input is +1, the OutputValue jumps to its Direction B threshold value of 5,250.
•
When the Input is +10,000, the OutputValue reaches its full Direction B output value of 7,500.
•
As soon as the Input is –1, the OutputValue jumps to its Direction A threshold value of 4,750.
•
When the Input is –10,000, the OutputValue reaches its full Direction A output value of 2,500.
•

Status and Fault Logic

This topic describes how status logic and fault logic are indicated for the function block.

Status Logic

Status logic determines if parameters are out of order or out of range.
Status Hex
Parameters are not within allowed range. 0x8008 At least one parameter is out of its defined range or in the wrong order.
*
Bit 16 set to 1 identifies a standard Danfossstatus or fault code.
*
Reported While
©
Danfoss | May 2018 AQ00000241en-000102 | 7
Loading...
+ 14 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use