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SD7
Operating Instructions Manual
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Wandfluh SD7 Operating Instructions Manual

Operati n g Instructions to Amplifier Electronics SD7
OPERATING INSTRUCTIONS
AMPLIFI ER MODULE SD 7
Wandfluh AG Postfach CH-3714 Frutigen
Tel: +41 33 672 72 72 Fax: +41 33 672 72 12
Page 1
Edition 17 33
SD7_OperatingInstructions_
Operati n g Instructions to Amplifier Electronics SD7
Contents
1 General i n formation 4 2 Product description 5
... . ......................................... ................................................................................. ................................................... 52.1 General
... . ......................................... ................................................................................. ................................................... 52.2 Field of application
... . ......................................... ................................................................................. ................................................... 52.3 Conformity
... . ......................................... ................................................................................. ................................................... 52.4 Labeling of the product
... . ......................................... ................................................................................. ................................................... 62.5 Type code
... . ......................................... ................................................................................. ................................................... 72.6 Technical data
... . ......................................... ................................................................................. ................................................... 102.7 Block diagram
3 Sa fety rule s 18
... . ......................................... ................................................................................. ................................................... 183.1 Installation / Commissioning / Parameterisation
4 Construction and F unction 19
... . ......................................... ................................................................................. ................................................... 194.1 Introduction
... . ......................................... ................................................................................. ................................................... 194.2 Description of the Function
... . ......................................... ................................................................................. ................................................... 204.3 Characteristic optimisation
... . ......................................... ................................................................................. ................................................... 214.4 State machine
... . ......................................... ................................................................................. ................................................... 224.5 Operating mode
... . ......................................... ................................................................................. ................................................... 224.6 Analogue inputs
... . ......................................... ................................................................................. ................................................... 244.7 Cablebreak detection
... . ......................................... ................................................................................. ................................................... 254.8 Digital inputs
... . ......................................... ................................................................................. ................................................... 254.9 Outputs
... . ......................................... ................................................................................. ................................................... 254.10 Internal signals
... . ......................................... ................................................................................. ................................................... 264.11 M ode of operation
... . ......................................... ................................................................................. ................................................... 284.12 Power reduction
5 Operating and i n di cating elem ents 30
... . ......................................... ................................................................................. ................................................... 305.1 General
... . ......................................... ................................................................................. ................................................... 305.2 Screw terminator v iew
... . ......................................... ................................................................................. ................................................... 345.3 Control elements
6 Commissioning 40
... . ......................................... ................................................................................. ................................................... 406.1 Connection instructions
... . ......................................... ................................................................................. ................................................... 426.2 Connection ex amples
7 Settings 46
... . ......................................... ................................................................................. ................................................... 467.1 Introduction
... . ......................................... ................................................................................. ................................................... 467.2 Assignment of the inputs/outputs
... . ......................................... ................................................................................. ................................................... 477.3 Parameter inconsistency
... . ......................................... ................................................................................. ................................................... 487.4 Tips for the first commissioning
... . ......................................... ................................................................................. ................................................... 497.5 Inputs/outputs according to Wandfluh standard
... . ......................................... ................................................................................. ................................................... 497.6 Default setting of the parameters
... . ......................................... ................................................................................. ................................................... 527.7 Parameters setting
... . ......................................... ................................................................................. ................................................... 717.8 Menu File
... . ......................................... ................................................................................. ................................................... 757.9 Menu Communication
... . ......................................... ................................................................................. ................................................... 767.10 M enu Configuration
... . ......................................... ................................................................................. ................................................... 827.11 M enu Commands
... . ......................................... ................................................................................. ................................................... 877.12 Fieldbus-Menu
... . ......................................... ................................................................................. ................................................... 887.13 M enu Analysis
... . ......................................... ................................................................................. ................................................... 987.14 M enu Help
8 Syste m does not work 100
... . ......................................... ................................................................................. ................................................... 1008.1 Procedure
9 PASO Installation and Operation 101
... . ......................................... ................................................................................. ................................................... 1019.1 System presupposition
... . ......................................... ................................................................................. ................................................... 1019.2 Installation
... . ......................................... ................................................................................. ................................................... 1029.3 PASO Update
... . ......................................... ................................................................................. ................................................... 1039.4 Connection to the Wandfluh card
... . ......................................... ................................................................................. ................................................... 1039.5 Mode "Off Line" / "On Line"
... . ......................................... ................................................................................. ................................................... 1049.6 Communication start up
... . ......................................... ................................................................................. ................................................... 1069.7 Communication interruption
... . ......................................... ................................................................................. ................................................... 1079.8 Program description
... . ......................................... ................................................................................. ................................................... 1089.9 Starting of PASO
... . ......................................... ................................................................................. ................................................... 1109.10 St ore parameter
... . ......................................... ................................................................................. ................................................... 1109.11 Limiting v alue error
... . ......................................... ................................................................................. ................................................... 1119.12 Used analog input not compatible to the selected signal type
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Operati n g Instructions to Amplifier Electronics SD7
... . ......................................... ................................................................................. ................................................... 1119.13 Description of Commands
10 Disposal 112 11 Accessories 113 12 Additiona l i nform ation 114
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Operati n g Instructions to Amplifier Electronics SD7

1 General information

This operating instructions mak es i t possible to use the SD7-Electronics s afely and ac c ording t o specification. The operating instructions includes instructions which Wandfluh as the manufacturer, or its resale organisations (Wandfl uh sister companies or distributors), provide to users within their duty t o ins t ruct .
For this purpose, the operati ng inst ruct i ons m ainly inc l udes:
· information about use acc ording to specification, i ns t allat ion and commis sioning of t he SD7-Electronics
· information about safety in dealing with control.
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Operati n g Instructions to Amplifier Electronics SD7
· Part number
· Serial number
· Software version
· Firmware versi on
· Card t ype
· Device configuration

2 Product description

2.1 General

The SD7-Electronics is integrated in a case for top-hat rail fastening. The connections are provided by terminal sc rew blocks .

2.2 Field of appli cation

The field of applicati on of the SD6-E lec t ronics is s it uated in the industrial field.

2.3 Conformity

The SD7-Electronics have been developed and tested in accordance wit h the lates t t echnic al s t andards . A pplied in particular was the EU Guideline 2004/108/EG (EM C Guideline).

2.4 Labeling of the product

Wit h the PC parameterisation software PASO SD7, the following information can be directly read-off the SD7­Elect ronics (= elec t ronic t ype code):
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2.5 Type code

Operati n g Instructions to Amplifier Electronics SD7
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2.6 Technical data

Design
Integrated in electronic case for top-hat rail cl amping
Dimension
Basic amplifier Enhanced amplifier
105 x 114 x 22.5 105 x 114 x 45mm
Installation
aufs chnappbar auf Hutschiene
Weight
Basic amplifier Enhanced amplifier amplifier with P rofibus
130g 130g 240g
Connection
Terminal screw blocks, m ax dimensi on 2.5mm
2
1 USB interface (connector type B)
Protection cl ass
IP30 acc. t o E N 60 529
Supply vol ta g e (dependin g on the type)
24 VDC
or 12 VDC
Voltage range
Supply voltage 24 VDC: Supply voltage 12 VDC:
21 ... 30 VDC
10,5 ... 15 VDC
Ripple on supply voltage
< ±5 %
Fuse
Customer must int egrate a slow fuse into his elec t ric al system
Tempe rature d ri ft
< 1% with DT = 40°C
No loa d current
40 ... 50 mA
Ma x. solenoi d current
24VDC vers ion 12VDC vers ion
1.8 A
2.3 A
The tot al s olenoid current of s i mult aneously powered solenoids depends on the ambient temperature (refer to section "Solenoid
outputs and ambient temperat ure" )
Analog ue i nputs
2 (Basic vers ion) resp. 4 (Enhanced version) different i al inputs Inputs 1 and 2 = 10-Bit resolution Inputs 3 and 4 = 16-Bit resolution All inputs are not galvanically separat ed SD7XXXDX0-AA
SD7XXXDX1-AX
SD7XXXDX2-AX
SD7XXXDX4-BX
SD7XXXDX5-BX
SD7XXXDX6-BX
Analogue i nputs 1: Analogue i nputs 2:
Analogue i nputs 1: Analogue i nputs 2:
Analogue i nputs 1: Analogue i nputs 2:
Analogue i nputs 1: Analogue i nputs 2: Analogue i nputs 3: Analogue i nputs 4:
Analogue i nputs 1: Analogue i nputs 2: Analogue i nputs 3: Analogue i nputs 4:
Analogue i nputs 1: Analogue i nputs 2:
0...±10VDC
0... 20mA, 4. . .20mA
0...±10VDC
0...±10VDC *
0... 20mA, 4. . .20mA
0... 20mA, 4. . .20mA
0...±10VDC
0... 20mA, 4. . .20mA
0...±10VDC
0... 20mA, 4. . .20mA
0...±10VDC
0...±10VDC *
0...±10VDC
0...±10VDC
0... 20mA, 4. . .20mA
0... 20mA, 4. . .20mA

2.6.1 General specifica tio ns

2.6.2 Electrical specifications

Operati n g Instructions to Amplifier Electronics SD7
9
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Operati n g Instructions to Amplifier Electronics SD7
Supply vol ta g e (dependin g on the type)
24 VDC
or 12 VDC
SD7XXXDX7-BX
SD7XXXDX8-BX
Analogue i nputs 3: Analogue i nputs 4:
Analogue i nputs 1: Analogue i nputs 2: Analogue i nputs 3: Analogue i nputs 4:
Analogue i nputs 1: Analogue i nputs 2: Analogue i nputs 3: Analogue i nputs 4:
0... 20mA, 4. . .20mA
0... 20mA, 4. . .20mA
0...±10VDC
0...±10VDC *
0... 20mA, 4. . .20mA
0... 20mA, 4. . .20mA
0... 20mA, 4. . .20mA
0... 20mA, 4. . .20mA
0...±10VDC
0...±10VDC
*) 0...10VDC at SD7 with Profibus
Input re sistance
Voltage input against ground Burden for current i nput
> 18 kOhm = 250 Ohm
Digital inp uts
2 (Basic vers ion) resp. 8 (Enhanced version) input s high-active Switc hing threshold high Switc hing threshold low
6 - 30VDC
0 - 1VDC
Se ri al interfa ce
1 USB interface (Connect or Type B)
Stabili sed output voltage
Supply voltage 24 VDC: Supply voltage 12 VDC:
+ 10 VDC
+ 8 VDC
max. load 30 mA
Solenoi d curre n t
Minimum c urrent Imin einstellbar Maxim um c urrent Imax einstellbar Supply volt age 24 VDC: Supply volt age 12 VDC:
0 ... 950 mA
Imin ... max. 1.8 A Imin ... max. 2.3 A
The tot al s olenoid current of s i mult aneously powered solenoids depends on the ambient temperature (refer to section "Solenoid
outputs and ambient temperat ure" )
Dither
Frequency adjustable Level adjustable
20 ... 250 Hz
0 ... 200 mA
Digital outputs
2 (Basic vers ion) resp. 4 (Enhanced version) outputs Lowside Switch Umax Imax
40 VDC
-0.7 A
Analog output (only Enhanced versi on )
without HART: Output voltage max. load with HART: Output current max. V olt age
+/– 10 VDC
+/– 3 mA
0 ... 20 mA
12 VDC
EMC Immunity Emission
EN 61000-6-2 EN 61000-6-4
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Operati n g Instructions to Amplifier Electronics SD7
Storage
Packing:
The module must be s t ored in the original packing
Temperature range:
-25 ... + 85° C
Resistanc e t o alkali and acid:
The module must be protected against alkalis and acids
In opera ti on
Temperature range:
-20 ... + 70° C The tot al s olenoid current of s i mult aneously powered solenoids depends on the ambient temperature (refer to section "S olenoid outputs
and ambient t emperature" )
Resistanc e t o alkali and acid:
The module must be protected against alkalis and acids

2.6.3 Environment

9

2.6.4 Solenoi d outputs and am bie nt te m p era ture

If only one solenoid output is powered at a t im e, t hen there are no restric t ions and the single solenoid current may reach the maximum current according to the Elect ric al S pecificat ions over the whole temperature range.
7
But t he total solenoid current of simult aneously powered s olenoids depends on the ambient t emperature. Exceeding this current limit will t rip the overcurrent protecti on ci rcuit , the SD7 falls into the failure state and blocks all function. Solenoids can be powered simultaneously, i. e. with t wo channels with one solenoid eac h or with inverted solenoid outputs.
If s olenoids are powered with more vol t age than their nominal volt age and are so over-energized, then at fast switc hing-on, the overcurrent protect ion may t rip and the SD7 may fall into fail ure stat e and block all function.
The following graphics s hows t he maxim um allowed total solenoid current over ambient t emperature when both solenoids are powered at the same time.
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2.7 Block diagram

Basic version wi th ana log in te rfa ce
Operati n g Instructions to Amplifier Electronics SD7
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Basic version wi th CANopen / J1939 interfa ce
Operati n g Instructions to Amplifier Electronics SD7
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Basic version wi th Profi bus DP interfa ce
Operati n g Instructions to Amplifier Electronics SD7
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Basic version wi th HART interface
Operati n g Instructions to Amplifier Electronics SD7
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Enhanced versi on wi th ana log in te rface
Operati n g Instructions to Amplifier Electronics SD7
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Enhanced versi on wi th CANopen / J1939 interfa ce
Operati n g Instructions to Amplifier Electronics SD7
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Enhanced versi on wi th Profi bus DP interfa ce
Operati n g Instructions to Amplifier Electronics SD7
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Enhanced versi on wi th HART interface
Operati n g Instructions to Amplifier Electronics SD7
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Operati n g Instructions to Amplifier Electronics SD7

3 Safety rules

3.1 Installation / Commissi oning / Paramet eri sat i on

· These operating instructions have to be carefull y s tudied beforehand and the instructi ons are to be complied with.
· Prior to the installati on, all power supply voltages and any other energy s ources have to be disc onnected.
· The inst allat ion/as sembly m ust only be carried out by specialist personnel with electrical k nowledge.
· Take into account precautionary measures concerning components on the module, which are subject to
damage as a result of electrost ati c dis charge.
· Wrong manipulat i ons by t he personnel cannot be prevented by the SD7-Electronics.
· Before the s witching on of the s upply voltage, the fuse protec tion, the c orrect wiring and t he c onform it y of the
power supply volt age with the permissible s upply voltage range have to be verified.
· The SD7-Electronics m onit ors t he working conditions within the el ectr onics and within the i nstal l at i on. Uncontrolled movements or f orce changes caused by unforeseen errors of the SD7-Electronics cannot be prevented in any case.
· Danger for persons has to be avoided by installi ng an emergency stop device which cuts off the power to the system.
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4 Construction and Function

- Enable channel
- Command s caling
- Command value fixed
- Ramp generator
- Monitoring
- Cont rol value
- Valve ty pe
- Solenoid driver
- Error evaluation
- Function
- Analog out put
(ref e r to section " E nable channel" ) (ref e r to section " Command sc aling" ) (ref e r to section " Command value fixed" ) (ref e r to section " Ramp generator" ) (ref e r to section "Monitoring" ) (ref e r to section " Control value" ) (ref e r to section " V alve type" ) (ref e r to section " S olenoid driver" ) (ref e r to section " E rror evaluation" ) (ref e r to section "Function" ) (ref e r to section " A nalog output" , only E nhanced version)
Operati n g Instructions to Amplifier Electronics SD7
Ref er to section "Bloc k diagram" .
10

4.1 Introduction

· All inputs and outputs have to be contacted through t he terminal screw block
· At the device front panel, there is a USB interfac e, t hrough which t he parameterisation and t he diagnostic s c an
be made by using the PC-Parameterisation software PA S O
· In the fac tory , the S D7-Elect ronics are adjusted with t he default values. The adjustment to the valves being
used, has to performed by t he user.
· Wandfluh c an c reate application specific parameters files in acc ordance to cust omer wish.

4.2 Description of the Function

T he SD7-Electronics has two channe ls. Each channel has a command value input and one or two solenoid outputs. The adjustable parameters are
organiz ed in function blocks , which are displayed in PAS O as small boxes . The following settings can be made per channel in these func t ion blocks:
52
52
58
59
60
61
63
64
68
69
70
Each channel is independent. Only the limits by the hardware are t o be c onsidered. For ex ample, if t he W andfluh­Elect ronic s has only two solenoid outputs . it's not possible to operat e two c hannels with each two s olenoids . In this c as e the maximum is at t wo channels with one solenoid output per c hannel or one c hannels with t wo s olenoid outputs per channel. The parameterisation software PASO automatically detects how many solenoids can be select ed with the c urrent setti ngs.
The ass i gnment of the analog and digital in- and outputs c an freel y be made by the user. Regarding inputs it is also possible to adjust a multiple allocation. That means digital and analogue inputs can be allocated to multiple channels (refe r to section " A s s ignment of t he inputs/ outputs " ). Digital in- and out puts which are set or reset by softwar e (ref e r to section "Configuration - Digital E/A" ) will be displayed with blue text color in the main window.
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The comm and value can be a voltage-, a c urrent-, a frequency- or a PWM-s ignal. t he s ignals are individually adjustable.
T he solenoid outputs includes a pulse-width-modulated current control with superimposed dither signal. These outputs c an control either proportional or switching solenoids. The current measurement can be switc hed on or off. The minimal and maximal solenoid currents or pulse widths can be adjusted separately. When using switching solenoids a fully adjustable power reduction func tion is available.
Parameters are set by means of the parameterising s oftware P A S O. Changed parameters are stored in a non­volatile memory in order to have t hem available after the Wandfluh-Electronics have been switched on again. The paramet erising s oftware PAS O provides to s ave t he set t ings an values of the parameter in a file, which always allows to do a download or an analysis.
Some function blocks are able to generate error messages. The function block "Error evaluation" (refer to sec tion
"Error evaluat ion" ) pick s up all error mes s ages. This function block manages the error handling of t he W andfluh-
68
Electronics. The process data are displayed online (r efer to section " A naly sis_S how values" ). This helps in c as e of support
88
and diagnost ics.

4.3 Characteristic opti m i sat i on

The SD7 electronics are provided with a possibili ty to optimis e the c harac teristic “Preset value input – s olenoid current out put”. The user is able to creat e a charac t eristi c (e.g. a l inearised characterist ic ) which matc hes his own application. The characteristic optimis at ion c an be turned on or off (refer to “Parameters_Solenoid driver ”).
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Status
Description
Disabled
· The assi gned channel of the W andfluh-El ec t ronics is disabled, no solenoid current will be active
· In this status, with t he command "Operation mode" (refer to section
"Commands_Valve operati on" ) the operating mode can be set
Active
· The assi gned channel of the W andfluh-El ec t ronics is enabled
· The assi gned channel of the W andfluh-El ec t ronics c an be operat ed acc ording
to the selec t ed operating mode
· Changing the operating mode is not possible
Transition
Description
TR_0
Switc hing-on the supply voltage
TR_1
Enable This is made in the operati ng mode "Local" t hrough the funct ion "E nable Chan ne l" (refe r to section " E nable channel" ) and in the operating mode "Remote PASO" through the parameter "Control mode" (refer to section
"Commands_Valve operati on" ).
TR_2
Disable This is made in the operati ng mode "Local" t hrough the funct ion "E nable Chan ne l" (refe r to section " E nable channel" ) and in the operating mode "Remote PASO" through the parameter "Control mode" (refer to section
"Commands_Valve operati on" ).

4.4 State machine

In t he following, with the help of a status diagram it is described, how t he start-up of the W andfluh-Electronics takes plac e and which status es are reached when and how.
Impo rta nt: Each chan nel has its ow n state m achine. Th e state s of each channel can be set se parately.
The following t able describes t he poss ible s t at us es and what is done in these st atus es :
82
The following t able describes t he transit ions from one status t o t he next one:
52
82
82
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Operati n g Instructions to Amplifier Electronics SD7

Operating m o de

Acti vating wi th
Description
Local
Menu point " Commands_Local Operat ing"
Operat ing via analogue and digital inputs on the Wandfluh-El ec t ronics
Remote PASO
Menu point " Commands_PAS O Operating
Operat ing direct with t he PA S O
SD7 type
Analog ue i nput 1
Analog ue i nput 2
Analog ue i nput 3
(only Enhanced
Version)
Analog ue i nput 4
(only Enhanced
Version)
SD7XXXD X0-AX
Voltage
Current----
SD7XXXD X1-AX
Voltage
Voltage----
SD7XXXD X2-AX
Current
Current
SD7XXXD X4-BX
Voltage
Current
Voltage
Current
SD7XXXD X5-BX
Voltage
Voltage
Voltage
Voltage
SD7XXXD X6-BX
Current
Current
Current
Current
4.5 Operati ng mode
The Wandfluh-El ect ronics have 2 operating modes. The following table describes, what c an be done in t he different operati ng modes and how t hey c an be acti vat ed:
The current operating mode is displayed in the status line (refer t o section "Starting of P A S O" ).
108

4.6 Analogue inputs

· The applied analogue signal is digit ised on analogue inputs 1 and 2 in the 10-Bit A / D c onverter and on analogue 3 and 4 (only E nhanced version) in the 16-Bi t A /D converter. Attention: By t he input range 4 . . . 20mA, t he resolution is < 10-Bit resp. 16-Bit!!
· Differen tial i np uts
All analogue inputs are different i al inputs . Differential inputs are used if the ground potential of t he ext ernal command value generator does not agree with the ground on the W andfluh-El ec t ronics . The differenti al inputs are not galvanically s eparated; they are made for ground potential differences up to 1.5V between the – (minus) connection of the different ial input and the 0V-ground of the Wandfluh-Elect ronics . If the different ial input is intended to use like an analogue input against ground, t he - (minus) connection of the differenti al input mus t be connected to the ground of the Wandfluh-Elec tronics. In this c as e please att end that t he solenoid current can cause a voltage drop between the Wandfluh-Elec t ronics and the power supply. It is recommended to connect the
- (minus) connection as near as possible to the power supply.
· Filtering
Each analog input can be individuall y filtered (refer to "Configuration_Filter for analog i nputs "). Thereby analog noise (e.g. voltage peaks) are attenuat ed. The filtering is done wit h t he function "exponential smoothing", where the speed / response time of the fil t er can be determined wit h t he parameter "smoothing factor". A high value at the smoothing factor results in a high degree of filtering, but a long response t im e, which will delayed the reading of the analog input. A small value at t he sm oothing factor results in a sm all degree of filtering, but a fast response time. So t he "smoothing factor" must be selec t ed as compromise between high degree of filtering and fast response time.
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Operati n g Instructions to Amplifier Electronics SD7
SD7XXXD X7-BX
Voltage
Voltage
Current
Current
SD7XXXD X8-BX
Current
Current
Voltage
Voltage
The assignment of the analog i nputs to the corresponding channel is free to choose (refer to section "Assignment
of the inputs/outputs " ).
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If a potentiometer is connected, a value of 1k Ohm is recommended.
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Attention:
Until a cablebreak will be detected, a time delay of about 100ms will pass. During this time, the cy li nder can make unintentional movements or unintent i onal force changes

4.7 Cablebreak detecti on

The c ommand value input c an be det ected for a cablebreak (only if Signal ty pe = V oltage, Current, Frequency or PWM). Therefore, a lower and an upper cablebreak limit c an be adjusted in the box Signal s c aling .A cablebreak is detec t ed, if the input si gnal is smaller than the lower c ablebreak limit or higher than the upper c ablebreak limi t .
If an cablebreak is detected, the internal error "E-1" (for command value) resp. " E-6" (for feedback value) i s act ive (refer to section "Error evaluat i on" ).
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The following c onditions had to be performed:
· The parameter "Signal type" m ust be on "Voltage", "Current" , " F requency" or "PWM" (refer to section Signal
scaling )
· The parameter "Cablebreak" must be on "On" (refer to section S i gnal sc aling )
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· The parameters " Lower cablebreak limt " and "Upper cablebreak limit" mus t be adjusted (refer t o section Signal
scaling )
· An acti on must be assigned to the error "E-1" (refer t o section "E rror evaluat ion" )
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4.8 Digital i nputs

The functin of the digital inputs and the assignment to the corresponding c hannel is free to choose (refer to secti on
"Assignment of the inputs/outputs " ).
46

4.9 Outputs

· Proportiona l solenoi d outputs A and B
T he solenoid outputs have a current output pulse-width-modulated at 1000Hz with s uperimposed dither. The current measurem ent c an be switched on or off. The assignment t o the corresponding channel is free to choose (refer to section "Assi gnment of the
inputs/outputs" ).
· Digital ou tputs
The SD7-Electronics has two (Basic version) resp. four (Enhanced version) digit al outputs . The function of the digital outputs and the as signment to the correspondi ng channel is free to choose (refer to section "Assignment
of the inputs/outputs " ) or c an be s et fixed on 0 or 1 with the PASO (refer to sect i on "Configuration_Digital
76
I/O" ).
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· Analog output (only Enhanced ve rsion)
The analog out put can be assigned to the following signals via the PASO SD7 (depending on the control mode, different signals are available):
- command value for the solenoid driver
- scaled comm and value
- scaled feedback value (only Controll er version and with clos ed loop control modes)
- scaled control deviation (only Controll er version and with closed loop control modes) The si gnal at the analog output c an be used for driving a valve with integrated electronics which has a volt age
interfac e. The out put l evel c an be adjusted (refer to section "Analog output" ).
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4.10 Internal si gnals

Internal s ignals can be selected inst ead of digital inputs or outputs. They are not guided to the outside, t hey are processed only internally.
This allows e.g. t o li nk a digital output t o a digital input without an external connection.
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Valve ty pe = S t andard 2-s olenoid
Valve ty pe = 4/3-W ege 1-solenoid
1 Valve ty pe = S t andard 2-s olenoid
Valve ty pe = 4/3-W ege 1-solenoid

4.11 Mode of operation

The mode of operation can be set independently for each channel. The following 4 modes of operation are possible:
· Mode o f opera tion "Comm and un i pola r (1-sol)" (Mode of opera ti on 1)
This Mode of operation is only possible, if the valve type is s et t o " S tandard 2-solenoid" (refer to section "Valve
63
type ").
With an input signal 0 ... 100% an internal command from 0 .. . 100% is generated.
· Mode o f opera tion "Comm and un i pola r (2-sol)" (Mode of opera ti on 2)
With an input signal 0 ... 100% an internal command from -100 ... + 100% is generat ed.
· Mode o f opera tion "Comm and biipola r (2-sol)" (Mode of opera tio n 3)
With an input signal -100 . . . 100% an internal command from -100 ... +100% is generated.
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Operati n g Instructions to Amplifier Electronics SD7
Valve ty pe = S t andard 2-s olenoid
Valve ty pe = 4/3-W ege 1-solenoid
· Mode o f opera tion "Comm and un pol ar (2-sol mit DigI np)" (Mode o f opera tion 4)
With an input signal 0 ... + 100% an internal command from 0 ... + 100% (digital input not act i ve) resp. 0 ... ­100% (digital input ac t ive) is generat ed.
The selection of the mode of operation is made in the box "V alve t ype"
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4.12 Power reduction

The power reduction c an be switc hed on with solenoid type "Switching solenoid without current measuring". Once the solenoid has switc h on, t he full solenoid current (= nominal current of the solenoid) pas ses t hrough during
the adjusted time (Parameter "Reduc tion time"). Thereafter, the current is limi t ed to t he reduced value (Parameter "Reduced value" ). The reduced value refers to t he nominal current of t he solenoid (100% = nominal c urrent, 50% = half nominal c urrent).
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Operati n g Instructions to Amplifier Electronics SD7
Wandfluh AG Postfach
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CH-3714 Frutigen
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Operati n g Instructions to Amplifier Electronics SD7

5 Operating and indicating elements

5.1 General

· All inputs and outputs have to be contacted through t he terminal screw blocks
· On the front panel of the electronic housing, there is a USB int erface, through which t he parameterisation and t he
diagnos tic s c an be made by using the PC-Parameterisation software PASO SD7
· Additionally t he front panel from t he Bas ic amplfier provides an optionally s im ple manual operation t erminal

5.2 Screw terminator view

Basic ampl i fi er with analog interface
Basic ampl i fi er with CANopen/J1939 or Profibus DP i nterface
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