Pepperl+Fuchs VBA-4E-G11-I-F Manual Download Page 18

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2014-

VBA-4E-G11-I-F

Appendix B

9.2

Delay Times

The VBA-4E-G11-I-F needs a certain amount of time to convert and transmit the analog

measuring signals to the AS-Interface master. This time period (= latency) is mainly composed

of the conversion time and the transmission time. The conversion time and the transfer time

depend on several factors.

Latency

Latency = delay of a signal under worst case conditions.
The analog-to-digital conversion in the analog module and the transmission via AS-Interface is

not in sync. In the worst case, the transmission of a channel via AS-Interface starts just before

the conversion of this channel is completed within the module. This gives rise to two scenarios:

1. The conversion time is longer than the transmission time

Latency = Conversion time + Transmission time * (Number of ch1)

2. The conversion time is shorter than the transmission time

Latency = Conversion time * (Number of ch1) + Transmission time

Figure 9.1

Conversion time > Transmission time

Figure 9.2

Conversion time < Transmission time

1st

2nd

Module

Analog-to-digital conversion

Channel 1

Analog-to-digital conversion

Channel 2

Analog-to-digital conversion

Channel 1

Transmission

Channel 1

Transmission

Channel 2

Transmission

Channel 2

Transmission

Channel 1

Conversion time

~ Transmission time x 3

Network

Transmission

Channel 1

Transmission

Channel 2

Transmission

Channel 1

~ Conversion time x 3

Transmission time

Network

Analog-to-digital

conversion

Channel 1

Analog-to-digital

conversion

Channel 2

Analog-to-digital

conversion

Channel 1

Analog-to-digital

conversion

Channel 2

Module

Summary of Contents for VBA-4E-G11-I-F

Page 1: ...VBA 4E G11 I F AS Interface analog module FACTORY AUTOMATION MANUAL ...

Page 2: ...erms of Delivery for Products and Services of the Electrical Indus try published by the Central Association of the Electrical Industry Zentralverband Elektrotechnik und Elektroindustrie ZVEI e V in its most recent version as well as the supplementary clause Expanded reservation of proprietorship VBA 4E G11 I F ...

Page 3: ...nnels 8 5 Installation 9 5 1 Storage and transport 9 5 2 Unpacking 9 5 3 Mounting 9 5 4 Connecting the AS Interface 9 5 5 Connecting the Sensors 11 6 Commissioning 12 6 1 Assigning an Address to the Module 12 6 2 Slave Profile 12 6 3 Parameterization 12 7 Troubleshooting 13 7 1 Causes and Elimination of Peripheral Faults 13 8 Appendix A 14 8 1 Dimensions 14 8 2 Technical Data 14 9 Appendix B 17 9 ...

Page 4: ...he entire range of device functions avoid faulty operation and associated errors reduce costs from downtimes and incidental repairs increase the effectiveness and operating efficiency of your plant Store this operating manual somewhere safe in order to have it available for future work on the device After opening the packaging please ensure that the device is intact and that the package is complet...

Page 5: ...eveloped and manufactured under observance of the applicable European standards and guidelines The product manufacturer Pepperl Fuchs GmbH 68307 Mannheim has a certified quality assurance system that conforms to ISO 9001 Note A Declaration of Conformity can be requested from the manufacturer ISO9001 ...

Page 6: ...d or repair are dangerous and will void the warranty and exclude the manufacturer from any liability If serious faults occur stop using the device Secure the device against inadvertent operation In the event of repairs return the device to your local Pepperl Fuchs representative or sales office The connection of the device and maintenance work when live may only be carried out by a qualified elect...

Page 7: ...ed address 0 Flashing green red peripheral fault IN1 LED IN2 LED IN3 LED IN4 LED Status of input signal yellow LED Off not active On signal within measuring range Flashing signal outside measuring range AUX LED Ext auxiliary power source UAUX dual LED green red Green voltage OK Red voltage reversed INT EXT LED Status indication input supply green LED Green input supply from AS Interface Off input ...

Page 8: ...nel is activated if an input signal within a range of 1 mA to 23 mA is present Any input channels activated remain active after the module is restarted Resetting Activated Input Channels In order to restore the module to its default status set parameter bit P3 to P3 0 and then to P3 1 Alternatively when switching on the module a signal of 1 mA must be present at all input channels for a period of ...

Page 9: ...ctor connects with the metal insert in the mounting base Ensure that this metal insert is connected with the protective ground via the mounting screws The mounting screws are not included Figure 5 1 Screw a blind plug onto unused connections to ensure the relevant degree of protection The recommended tightening torque for securing blind plugs is 0 4 Nm 5 4 Connecting the AS Interface The module is...

Page 10: ...the flat cable is positioned correctly 4 Reattach the upper part of the module 5 Tighten the central screw The recommended tightening torque for this screw is 1 8 Nm The AUX LED and the AS i FAULT LED light up green when the module is connected to the AS Interface and the external auxiliary power source UAUX 1 2 ...

Page 11: ...3 wire Connection examples Current input IN1 IN4 1 2 4 3 4 3 1 2 5 24 V I1 0 V 0 V Sig Note Connection Instructions Use shielded cables to connect the sensors Note Pin 5 of the M12 round plug connector is the functional ground When the central screw is tightened pin 5 connects with the metal insert in the mounting base see chapter 5 3 This metal insert then makes contact with the mounting surface ...

Page 12: ...you activate the filter for 50 60 Hz power frequencies With an activated filter power frequency interference is suppressed In this case the conversion time is extended see chapter 9 2 Parameter P1 Not Used Parameter P2 Peripheral Fault Default value P2 1 active Parameter P2 is used to switch notification of a peripheral fault in the event of a measuring overrange on or off see chapter 9 If notific...

Page 13: ...cting peripheral faults If none of these potential solutions correct the peripheral fault please contact Pepperl Fuchs Cause Solution Sensor supply overload Check sensor supply for short circuit Measured values outside the measuring range Check the connected measurement sensors for wire break short circuit Auxiliary power too low switch set to EXT Check the auxiliary power source No input channel ...

Page 14: ...ashing green red peripheral fault LED ANALOG status of input signal LED yellow off not active on signal within measurement range flashing signal outside of measurement range LED AUX ext auxiliary voltage UAUX dual LED green red green voltage OK red reverse voltage LED INT EXT status display input supply LED green green input supply from AS Interface off input supply from auxiliary voltage Auxiliar...

Page 15: ...bits function via AS Interface The transfer of the data value is based on AS Interface Profile 7 3 Parameter bits programmable via AS i function P0 50 60 Hz filter P0 1 enabled P0 0 disabled P1 Not used P2 Indication of the peripheral fault by exceeding measuring range P2 1 peripheral fault is reported P2 0 peripheral fault is not reported P3 P3 1 wire break detection active automatic channel dete...

Page 16: ...ications Connection AS Interface UAUX cable piercing method flat cable yellow flat cable black Inputs M12 round connector Protection degree IP68 IP69K Material Housing PBT PC Mounting screw Stainless steel 1 4305 AISI 303 Mass 200 g Mounting Mounting base ...

Page 17: ...2 4 20 4000 20000 On Nominal range 1 3 999 1000 3999 On Extended range 2 1 32767 Flashing1 Below threshold peripheral fault Table 9 1 Measuring range 1 mA 23 mA 1 When channel is activated 2 Measurement accuracy corresponds to the nominal range Input signal mA Display on the master Input LED 23 32767 Flashes Above threshold peripheral fault 20 001 23 20001 23000 On Extended range 1 0 20 0000 20000...

Page 18: ...arios 1 The conversion time is longer than the transmission time Latency Conversion time Transmission time Number of channels 1 2 The conversion time is shorter than the transmission time Latency Conversion time Number of channels 1 Transmission time Figure 9 1 Conversion time Transmission time Figure 9 2 Conversion time Transmission time 1st 2nd Module Analog to digital conversion Channel 1 Analo...

Page 19: ... The duration of a cycle depends on the number of occupied addresses in the AS interface network An address is considered occupied if one of the following configurations apply A standard address is assigned e g 1 An A or B Address is assigned e g 1A or 1B An A and a B Address are assigned e g 1A and 1B When calculating the cycle time each of these configurations assumed to be one occupied address ...

Page 20: ...s GmbH 68307 Mannheim Germany Tel 49 621 776 0 E mail info de pepperl fuchs com USA Headquarters Pepperl Fuchs Inc Twinsburg Ohio 44087 USA Tel 1 330 4253555 E mail sales us pepperl fuchs com Asia Pacific Headquarters Pepperl Fuchs Pte Ltd Company Registration No 199003130E Singapore 139942 Tel 65 67799091 E mail sales sg pepperl fuchs com TDOCT2824B_ENG 02 2014 ...

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