Danfoss Input Function Blocks Operating guide

User Manual
PLUS+1® GUIDE Software
PLUS+1 Function Block Library—Input Function Blocks
www.danfoss.com
User Manual
PLUS+1® Compliant Function Block Library—Input Function Blocks
Revision history Table of revisions
Date Changed Rev
February 2019 Updated calibration and deadband images 0102
February 2019 Rebranding 0101
March 2011 AB
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PLUS+1® Compliant Function Block Library—Input Function Blocks

Contents

Risk Reduction
Design, Test, and Secure to Reduce Risks................................................................................................................................5
Design...................................................................................................................................................................................................5
Test.........................................................................................................................................................................................................5
Secure................................................................................................................................................................................................... 6
FNR_Direction Function Block
Inputs....................................................................................................................................................................................................7
Outputs................................................................................................................................................................................................ 7
Function Block Connections.........................................................................................................................................................9
Fault Logic...........................................................................................................................................................................................9
Identical Function Blocks Need Different Namespace Values to Successfully Compile.........................................9
Change Namespace Value.....................................................................................................................................................10
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 11
Multi_Dig_In Function Block
Inputs..................................................................................................................................................................................................12
Outputs..............................................................................................................................................................................................13
Function Block Connections...................................................................................................................................................... 14
Status Logic......................................................................................................................................................................................15
Fault Logic........................................................................................................................................................................................ 15
Example 1—Slct is T......................................................................................................................................................................15
Example 2—Slct is F......................................................................................................................................................................16
Identical Function Blocks Need Different Namespace Values to Successfully Compile...................................... 16
Change Namespace Value.....................................................................................................................................................17
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 18
Sensor_2Pt Function Block
Inputs..................................................................................................................................................................................................19
Outputs..............................................................................................................................................................................................20
Function Block Connections...................................................................................................................................................... 21
Status Logic......................................................................................................................................................................................22
Fault Logic........................................................................................................................................................................................ 22
Calibration and Fault Values...................................................................................................................................................... 22
Deadband Values...........................................................................................................................................................................23
Identical Function Blocks Need Different Namespace Values to Successfully Compile...................................... 24
Change Namespace Value.....................................................................................................................................................25
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 26
Sensor_3Pt Function Block
Inputs..................................................................................................................................................................................................27
Outputs..............................................................................................................................................................................................28
Function Block Connections...................................................................................................................................................... 29
Status Logic......................................................................................................................................................................................30
Fault Logic........................................................................................................................................................................................ 30
Calibration and Fault Values...................................................................................................................................................... 30
Deadband Values...........................................................................................................................................................................31
Identical Function Blocks Need Different Namespace Values to Successfully Compile...................................... 32
Change Namespace Value.....................................................................................................................................................33
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 34
Sensor_2Pt_AC Function Block
Inputs..................................................................................................................................................................................................35
Outputs..............................................................................................................................................................................................36
Configuration Settings.................................................................................................................................................................36
Function Block Connections...................................................................................................................................................... 38
Status Logic......................................................................................................................................................................................39
Fault Logic........................................................................................................................................................................................ 39
Calibration and Fault Values...................................................................................................................................................... 39
Deadband Values...........................................................................................................................................................................40
Calibration Windows.................................................................................................................................................................... 41
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Contents
Identical Function Blocks Need Different Namespace Values to Successfully Compile...................................... 42
Change Namespace Value.....................................................................................................................................................43
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 44
Sensor_3Pt_AC Function Block
Inputs..................................................................................................................................................................................................45
Outputs..............................................................................................................................................................................................46
Configuration Settings.................................................................................................................................................................46
Function Block Connections...................................................................................................................................................... 48
Status Logic......................................................................................................................................................................................49
Fault Logic........................................................................................................................................................................................ 49
Calibration and Fault Values...................................................................................................................................................... 49
Deadband Values...........................................................................................................................................................................50
Calibration Windows.................................................................................................................................................................... 51
Identical Function Blocks Need Different Namespace Values to Successfully Compile...................................... 52
Change Namespace Value.....................................................................................................................................................53
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 54
Freq_to_RPM Function Block
Inputs..................................................................................................................................................................................................55
Outputs..............................................................................................................................................................................................55
Function Block Connections...................................................................................................................................................... 56
Status Logic......................................................................................................................................................................................56
Fault Logic........................................................................................................................................................................................ 56
Identical Function Blocks Need Different Namespace Values to Successfully Compile...................................... 57
Change Namespace Value.....................................................................................................................................................57
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 58
Freq_to_Speed Function Block
Inputs..................................................................................................................................................................................................59
Outputs..............................................................................................................................................................................................59
Function Block Connections...................................................................................................................................................... 61
Status Logic......................................................................................................................................................................................61
Fault Logic........................................................................................................................................................................................ 62
Identical Function Blocks Need Different Namespace Values to Successfully Compile...................................... 62
Change Namespace Value.....................................................................................................................................................62
IEC 61508-3 Annex D Supplemental Information.............................................................................................................. 64
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PLUS+1® Compliant Function Block Library—Input Function Blocks

Risk Reduction

Design, test, and secure applications that you develop to reduce risks of personal injury and equipment damage.

Design, Test, and Secure to Reduce Risks

Applications created with PLUS+1® GUIDE typically control equipment such as tractors, cranes, and harvesters.
Using heavy, powerful, and mobile off-road equipment always involves the risk of personal injury and equipment damage, even when this equipment is operating under normal operating conditions. Abnormal operating conditions greatly increase the risk of personal injury and equipment damage.
The PLUS+1® program has no automatic protections against these risks. The tool has no protection against the risks that result from bugs in the tool software, errors in the tool manual, or incompatibilities between software versions of the tool.
You must:
Design your application to reduce these risks.
Test your application to reduce these risks.
Secure your application against unauthorized changes in its operating parameters to reduce these risks.

Design

Test

As you design your application, you must include the fault checking and the error handling needed to reduce risks in normal and abnormal operating conditions.
Consider the following when developing fault checking and error handling for your PLUS+1® GUIDE application:
How the machine is normally used.
Possible operator errors and their consequences.
Industry safety standards and legal requirements.
Input and output failures and their consequences. These failures can include:
Joystick, sensor, and other inputs suddenly going to ±100 % or to 0 %.
Joystick, sensor, and other inputs suddenly going to ±100 % or to 0 %.
Outputs that control machinery direction, speed, and force suddenly changing direction or going
to ±100 % or to 0 %. Decide how likely each failure is. The more likely a failure, the more you need to protect against
the consequences of the failure.
The sequence of events and consequences of a fault or error.
The sequence of events and consequences of an emergency stop.
After creating an application, you are responsible for testing the application. Download your application to hardware and test its operation under both normal and abnormal
operating conditions. Make sure:
Individual inputs produce expected outputs.
Fault handling and error checking work as designed.
You must repeat your tests when you make configuration, calibration, or software changes to the application.
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PLUS+1® Compliant Function Block Library—Input Function Blocks
Risk Reduction

Secure

You have the responsibility to secure your application against unauthorized changes. Always use the PLUS+1® GUIDE program’s Toolkey feature to restrict access to your application’s
operating parameters.
Without Toolkey protection, there is an increased risk that unauthorized personnel could use the PLUS+1® Service Tool program to change your application’s operating parameters.
Changes in your application’s operating parameters might cause unexpected machinery movement that results in personal injury and equipment damage.
Toolkey protection reduces the risk that unauthorized personnel could use the PLUS+1® program to change your application’s operating parameters.
Refer to How to Use the Toolkey to Restrict Service Tool Access to Application Values in the PLUS+1—How-to chapter of the PLUS+1 GUIDE User Manual (Danfoss part 10100824).
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PLUS+1® Compliant Function Block Library—Input Function Blocks

FNR_Direction Function Block

The FNR_Direction block provides interlock logic to prevent output commands when changing directions before coming to a complete stop.
Typical uses include:
Protecting hardware on machines from damage caused by abrupt changes in direction under heavy load.
Detecting faults on directional switches.

Inputs

The inputs to the FNR_Direction function block are described.
Use only the data types specified in this table. Other data types cause compiler errors.
Item Type Range Description ChkPt BOOL ——
Fwd Sw BOOL —— Forward switch—input signal indicating that the desired direction is forward. Rvs Sw BOOL —— Reverse switch—input signal indicating that the desired direction is reverse. Fdbk S32 -2147483648–
2147483647
True—include the function block’s built-in Advanced Checkpoint with Namespace in the compiled
LHX download file. False—exclude the function block’s built-in Advanced Checkpoint with Namespace components
from the compiled LHX download file.
Feedback—input signal indicating the actual direction of movement. The magnitude of the signal is not used.
Fdbk < 0—reverse
Fdbk = 0—neutral
Fdbk > 0—forward

Outputs

The outputs of the FNR_Direction function block are described.
Item Type Range Description IO Bus —— Outputs a bus with all of the function block's input and output signals.
This bus provides a convenient way to distribute this function block's signals to your application.
Fault U16 —— Reports the faults of the function block.
This output follows the standard bitwise scheme described in the Status Logic topic.
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FNR_Direction Function Block
Item Type Range Description Dir S16 -1–1 Current output direction. This value is only allowed to change if the Fdbk= 0 or its value is the same
sign as the desired direction.
-1 = Reverse
0 = Neutral
1 = Forward
Drv Enbl BOOL —— Drive enable—this signal can be used to provide an interlock for an application’s propel command or
work function.
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PLUS+1® Compliant Function Block Library—Input Function Blocks
FNR_Direction Function Block

Function Block Connections

Connections you can make with the function block are described.
Description
Item 1
2 Forward Switch Input 3 Reverse Switch Input 4 Signed feedback signal from speed sensor, indicating direction. 5 Outputs a bus with all of the function block's input and output signals. 6 Reports the faults of the function block. 7 Output direction command. 8 Drive enable signal to be used as part of an application propel or work function interlock.
True—include the function block’s built-in Advanced Checkpoint with Namespace in the compiled LHX download file.
False—exclude the function block’s built-in Advanced Checkpoint with Namespace components from the compiled LHX download file.

Fault Logic

This topic describes how fault logic is indicated for the function block.
Condition Hex
Invalid input combination
*
Bit 16 set to 1 identifies a standard Danfoss status or fault code.
*
Binary Cause Response Correction
0x8040 01000
000
Both Fwd Sw and Rvs Sw are true at the same time.
Drive En = False
Dir = 0

Identical Function Blocks Need Different Namespace Values to Successfully Compile

If you use the same function block more than once in an application, you must change each function block’s namespace value to avoid compiler errors.
All function blocks contain Advanced Checkpoint with Namespace components that enable the PLUS+1 Service Tool to read block input and output values.
Some function blocks contain non-volatile memory components that store function block operating parameters.
Both these components use memory names (“aliases”) to allocate memory. Identical memory names cause compiler errors.
Ensure system design only allows at most one direction input to be true at any time.
®
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FNR_Direction Function Block
The namespace value adds a unique prefix to each component name to avoid errors. Keep each namespace value short to save controller memory.

Change Namespace Value

To successfully compile your application, change the namespace value for function blocks that are used more than once in an application.
1. In the PLUS+1® GUIDE menu bar, click the Query/Change button.
2. Click on the function block whose namespace you want to set to a unique value. The Edit Page window opens.
3. In the Edit Page window, enter a meaningful Namespace value.
Namespace values are case-sensitive.
To save controller memory, use a short namespace value.
4. Press Enter.
5. Repeat these steps to enter unique namespace values for other identical function blocks.
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PLUS+1® Compliant Function Block Library—Input Function Blocks
FNR_Direction Function Block

IEC 61508-3 Annex D Supplemental Information

The following table provides IEC 61508-3 Annex D supplemental information.
Item
Function block name FNR_Direction Function block version 4.0. Function block development
environment Compatible hardware
Function block developed in compliance with
Competence required of function block integrator
Contacting Danfoss
Description
PLUS+1® GUIDE version 8.1 and later.
Verified in the PLUS+1® GUIDE compile process. When the PLUS+1® GUIDE compiler finds a function block that is incompatible with hardware, it aborts the compile process and logs an error message. The error message gives the location of the function block and states “Error 80: component not supported in hwd.”
Danfoss Software Product Development Process (PDP), which includes ISO 9001 and IEC 61508-3 standards.
The knowledge, competence, and training required to:
Understand this manual.
Use the PLUS+1® GUIDE program to develop a machine control application.
Follow quality software practices to develop a machine control application.
https://www.danfoss.com/en/products/software/dps/plus1-software-services-support-and-training/plus1-support-and­services
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PLUS+1® Compliant Function Block Library—Input Function Blocks

Multi_Dig_In Function Block

The Multi_Dig_In block converts an analog voltage signal applied to its Input into several Dig output signals.
Typical uses for this function block include:
Reading the status of a multi-position sensor switch.
Reading the position of HMI switches on a dashboard control.

Inputs

The inputs to the Multi_Dig_In function block are described.
Use only the data types specified in this table. Other data types cause compiler errors.
Item Type Range Description ChkPt BOOL ——
Dig In (Nmbr) U8 1–8 Sets the number of active Dig outputs and the activation point for each Dig output.
Grd Bnd (mV) U16 0–Rnge/(1+Dig In) When Slct (Select) is T ,the Grd Bnd (Guard Band) value sets the width of a guard band that centers on
True—include the function block’s built-in Advanced Checkpoint with Namespace in the compiled
LHX download file. False—exclude the function block’s built-in Advanced Checkpoint with Namespace components
from the compiled LHX download file.
determines the interval between Dig output activation points.
The block distributes activation points evenly across the Range.
the activation point for each Dig output. 1000 = 1000 (no scaling applied) When Slct is F, the Grd Bnd value sets the width of a guard band that extends above the activation point for each Dig output. 1000 = 100 (10.00% scaling applied)
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PLUS+1® Compliant Function Block Library—Input Function Blocks
Multi_Dig_In Function Block
Item Type Range Description Select BOOL —— When Select is T, the block enables just one Dig output at a time.
An Input signal in the guard band of a Dig output sets its output T. A T output adds hysteresis bands to both sides of the output’s guard band. (Each hysteresis band is equal to 10% of the guard band’s width.) A T Dig output goes F when the Input signal moves outside of the hysteresis bands. When Select is F, the block sequentially enables Digoutputs. An Inputsignal above the guard band of a Dig output sets its output T. A T Dig output goes F when the
Input signal drops below its guard band. Rnge (mV) U16 0–40000 Range of Input over which the block operates. Offset (mV) U16 0–40000 Adjusts the center voltage calculation for each activation point. The Offset value moves each range up
by that amount.
10 = 10 mV
Input U16 0 to (Rnge +
Offset)

Outputs

The outputs of the Multi_Dig_In function block are described.
Signal from the sensor or HMI device. Changes in this input’s value switch the Dig outputs between T
and F.
10 = 10 mV
Item Type Range Description IO Bus —— Outputs a bus with all of the function block's input and output signals.
This bus provides a convenient way to distribute this function block's signals to your application. Status U16 —— Reports the status of the function block.
This output follows the standard bitwise scheme described in the Status Logic topic. Fault U16 —— Reports the faults of the function block.
This output follows the standard bitwise scheme described in the Status Logic topic.
Dig 1 BOOL —— Dig 2 BOOL —— Dig 3 BOOL —— Dig 4 BOOL —— Dig 5 BOOL —— Dig 6 BOOL —— Dig 7 BOOL —— Dig 8 BOOL ——
Interpreted input state for the lowest digital range.
Interpreted input state for digital range 2.
Interpreted input state for digital range 3.
Interpreted input state for digital range 4.
Interpreted input state for digital range 5.
Interpreted input state for digital range 6.
Interpreted input state for digital range 7.
Interpreted input state for digital range 8.
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PLUS+1® Compliant Function Block Library—Input Function Blocks
Multi_Dig_In Function Block

Function Block Connections

Connections you can make with the function block are described.
Description
Item 1
2 Number of digital inputs to be interpreted. 3 Sets the range around or above each switch point. 4 Sets the input mode type. When true, only one Dig output is true at a time. When false, all Dig outputs at or below the Input switch point are
5 Indicates the expected range of Input from the lowest to highest switch point. 6 Indicates the shift of the Input signal above 0. 7 Signal from the sensor representing digital input states. 8 Outputs a bus with all of the function block's input and output signals. 9 Reports the status of the function block. 10 Reports the faults of the function block. 11to18Digital input states interpreted from the Input.
True—include the function block’s built-in Advanced Checkpoint with Namespace in the compiled LHX download file.
False—exclude the function block’s built-in Advanced Checkpoint with Namespace components from the compiled LHX download file.
true..
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PLUS+1® Compliant Function Block Library—Input Function Blocks
Multi_Dig_In Function Block

Status Logic

This topic describes how status logic is indicated for the function block.
Condition Hex
Invalid configuration 0x8008 1000
*
Bit 16 set to 1 identifies a standard Danfoss status or fault code.

Fault Logic

Condition Hex
Input value is too low. 0x8001 0001 Input value below zero. Output signals are based on
Input value is too high. 0x8002 0010 Input value above (Rnge +
*
Bit 16 set to 1 identifies a standard Danfoss status or fault code.
*
Binary Cause Response Correction
Dig In, Grd Bnd, Rnge and/or
Offset parameters out of range
The Grd Bnd is larger than the
calculated digital interval size.
Output signal is calculated using the parameters clamped to their respective ranges.
The Grd Bnd is limited to the calculated digital interval size.
This topic describes how fault logic is indicated for the function block.
*
Binary Cause Response Correction
Input = 0.
Offset).
Output signals are based on Input = (Rnge + Offset).
Review function inputs to ensure they are within their valid ranges..
Ensure Input is within the valid range.
Ensure Input is within the valid range. Ensure Rnge and Offset are correct.

Example 1—Slct is T

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PLUS+1® Compliant Function Block Library—Input Function Blocks
Multi_Dig_In Function Block

Example 2—Slct is F

Identical Function Blocks Need Different Namespace Values to Successfully Compile

If you use the same function block more than once in an application, you must change each function block’s namespace value to avoid compiler errors.
All function blocks contain Advanced Checkpoint with Namespace components that enable the PLUS+1 Service Tool to read block input and output values.
Some function blocks contain non-volatile memory components that store function block operating parameters.
Both these components use memory names (“aliases”) to allocate memory. Identical memory names cause compiler errors.
The namespace value adds a unique prefix to each component name to avoid errors. Keep each namespace value short to save controller memory.
®
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PLUS+1® Compliant Function Block Library—Input Function Blocks
Multi_Dig_In Function Block

Change Namespace Value

To successfully compile your application, change the namespace value for function blocks that are used more than once in an application.
1. In the PLUS+1® GUIDE menu bar, click the Query/Change button.
2. Click on the function block whose namespace you want to set to a unique value. The Edit Page window opens.
3. In the Edit Page window, enter a meaningful Namespace value.
Namespace values are case-sensitive.
To save controller memory, use a short namespace value.
4. Press Enter.
5. Repeat these steps to enter unique namespace values for other identical function blocks.
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PLUS+1® Compliant Function Block Library—Input Function Blocks
Multi_Dig_In Function Block

IEC 61508-3 Annex D Supplemental Information

The following table provides IEC 61508-3 Annex D supplemental information.
Item
Function block name Multi_Dig_In. Function block version 4.0. Function block development
environment Compatible hardware
Function block developed in compliance with
Competence required of function block integrator
Contacting Danfoss
Description
PLUS+1® GUIDE version 8.1 and later.
Verified in the PLUS+1® GUIDE compile process. When the PLUS+1® GUIDE compiler finds a function block that is incompatible with hardware, it aborts the compile process and logs an error message. The error message gives the location of the function block and states “Error 80: component not supported in hwd.”
Danfoss Software Product Development Process (PDP), which includes ISO 9001 and IEC 61508-3 standards.
The knowledge, competence, and training required to:
Understand this manual.
Use the PLUS+1® GUIDE program to develop a machine control application.
Follow quality software practices to develop a machine control application.
https://www.danfoss.com/en/products/software/dps/plus1-software-services-support-and-training/plus1-support-and­services
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PLUS+1® Compliant Function Block Library—Input Function Blocks

Sensor_2Pt Function Block

The Sensor_2Pt block converts a raw signal from a sensor into a percentage output.
The percentage output is based on the signal characteristics of the sensor. This block scales its Output between 0% and +100%.
Typical uses for this function block include:
Reading analog sensors where piece–to-piece variation is negligible for the required accuracy of the
signal. Implementing an alternative sensor calibration algorithm and using this block for the scaling and
fault detection functions. Reading max speed potentiometers, trim steer potentiometers, and fuel level sensors.

Inputs

The inputs to the Sensor_2Pt function block are described.
Use only the data types specified in this table. Other data types cause compiler errors.
Item Type Range Description ChkPt BOOL ——
Fault % U16 0–10000 The Input is allowed to go above the Hi Cal % and below the Lo Cal % by a calculated allowable fault
Hi DBnd % U16 0–5000 Hi DBnd % (High Deadband Percent) defines the deadband region for the sensor’s upper limit.
Lo DBnd % U16 0–5000 Lo DBnd % (Low Deadband Percent) defines the deadband region for the sensor’s lower limit.
Hi Cal % U16 0–10000 Hi Cal % (High Calibration Percent) defines the upper limit of the sensor’s signal in terms of the sensor’s
True—include the function block’s built-in Advanced Checkpoint with Namespace in the compiled
LHX download file. False—exclude the function block’s built-in Advanced Checkpoint with Namespace components
from the compiled LHX download file.
value. The fault value is the Fault % of the calibrated input range. 1000 = 10.00%
Increasing the deadband value decreases the sensor’s resolution while reducing the deadband narrows the margin for acceptable input noise and sensor variation. 1000 = 10.00%
Increasing the deadband value decreases the sensor’s resolution while reducing the deadband narrows the margin for acceptable input noise and sensor variation. 1000 = 10.00%
supply voltage. This is a percentage of Snsr Pwr. 1000 = 10.00%
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Sensor_2Pt Function Block
Item Type Range Description Lo Cal % U16 0–10000 Lo Cal % (Low Calibration Percent) defines the lower limit of the sensor’s signal in terms of the sensor’s
supply voltage. This is a percentage of Snsr Pwr. 1000 = 10.00%
Snsr Pwr U16 0–65535 Snsr Pwr (Sensor Power) defines the reference for ratiometric calculations. If a sensor is ratiometric, the
function block’s Output signal is continually compensated for variation in the supply. If the sensor is not ratiometric, connect a constant value representing the full scale signal range.
Input U16 0–65535 Signal from the sensor. The units of this signal must be the same units for Snsr Pwr.

Outputs

The outputs of the Sensor_2Pt function block are described.
Item Type Range Description IO Bus —— Outputs a bus with all of the function block's input and output signals.
This bus provides a convenient way to distribute this function block's signals to your application.
Status U16 —— Reports the status of the function block.
This output follows the standard bitwise scheme described in the Status Logic topic.
Fault U16 —— Reports the faults of the function block.
This output follows the standard bitwise scheme described in the Status Logic topic.
Output U16 0–10000 Percent of Input applied to the sensor’s calibrated range.
1000 = 10.00%
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PLUS+1® Compliant Function Block Library—Input Function Blocks
Sensor_2Pt Function Block

Function Block Connections

Connections you can make with the function block are described.
Description
Item 1
2 Deviation below and above the calibration point allowed before reporting an input fault condition. 3 Defines the size of the deadband region at the high calibration point. Within this region the output is 10000 (100%). 4 Defines the size of the deadband region at the low calibration point. Within this region the output is 0 (0%). 5 Sets the high end of the sensor’s nominal Input signal range as a percent of Snsr Pwr. 6 Sets the low end of the sensor’s nominal Input signal range as a percent of Snsr Pwr. 7 Used to monitor the sensor’s power supply to make ratiometric adjustments within the function block. 8 Signal indicating the position of the sensor. 9 Outputs a bus with all of the function block's input and output signals. 10 Reports the status of the function block. 11 Reports the faults of the function block. 12 Position indicator of the sensor as a percent of its calibration range.
True—include the function block’s built-in Advanced Checkpoint with Namespace in the compiled LHX download file.
False—exclude the function block’s built-in Advanced Checkpoint with Namespace components from the compiled LHX download file.
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