Modbus questions & answers - Control Systems Application and Knowledge Store

11

answers

1

votes

11706

views

Slave device not responding, modbus RTU

Asked 5 years ago by PM860 Rank: 1022

DCS in general > Communication > Modbus > Modbus RTU, 800xA > AC 800M

4

answers

3

votes

5692

views

checksum error, Modbus RTU

Asked 3 years ago by dannypat Rank: 1201

DCS in general > Communication > Modbus > Modbus RTU, PLC Automation > AC500

3

answers

4

votes

5576

views

How can i transfer REAL numbers for example the value "5.32" through Modbus RTU ?

Commented 10 months ago by akhraszaid Rank: 195

DCS in general > Communication > Modbus

2

answers

4

votes

3712

views

Termination resistor for modbus rtu

Commented 2 years ago by arunvt1992 Rank: 654

DCS in general > Communication > Modbus > Modbus RTU

2

answers

2

votes

71

views

double word by modbus

Commented 4 days ago by ythant Rank: 2753

PLC Automation > AC500-eCo > _Other, DCS in general > Communication > Modbus

1

answer

0

votes

2215

views

modbus s7-1200 - to ACS580 inverter

Asked 5 years ago by Mnajgebaur Rank: 3070

DCS in general > Communication > Modbus > Modbus RTU, Drives > DC drives fieldbus adapter > MotiFlex > OPT-FB-003 - Modbus RTU, Drives

9

answers

1

votes

3365

views

MODBUS. Master not able to read slave response.

Commented 2 months ago by kstoilov AKS expert

Rank: 5

DCS in general > Communication > Modbus > Modbus RTU, 800xA > AC 800M > CI modules (other), 800xA > AC 800M

5

answers

4

votes

4044

views

Modbus TCP/IP

Asked 6 years ago by Luka Rank: 511

DCS in general > Communication > Modbus > Modbus TCP, PLC Automation > AC500 > CI modules > CI521, CI522 (Modbus TCP), PLC Automation > AC500

1

answer

1

votes

1216

views

CI867 as Modbus TCP slave

Asked 5 years ago by pauly25 Rank: 925

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP)

5

answers

5

votes

1684

views

Modbus RTU over TCP

Asked 5 years ago by insen1 Rank: 970

DCS in general > Communication > Modbus > Modbus RTU, DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication > Modbus, 800xA > AC 800M

1

answer

0

votes

2699

views

Connection REF615 and SCADA over MODBUS TCP/IP

Commented 1 year ago by heramirez Rank: 1689

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication > Modbus, Distribution Automation > Feeder protection & control > REF6xx series

1

answer

2

votes

1873

views

CI867 Modbus TCP Master Communication Error

Asked 3 years ago by Jagl77 Rank: 240

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP), 800xA > System > System version > 800xA 6.0

4

answers

2

votes

2464

views

modbus tcp slave not responding?

Asked 4 years ago by Aoo Rank: 1977

DCS in general > Communication > Modbus > Modbus TCP, PLC Automation > AC500 > CI modules > CI521, CI522 (Modbus TCP), PLC Automation > AC500, PLC Automation > Engineering > Automation Builder > CODESYS, PLC Automation > Engineering > Automation Builder

2

answers

2

votes

1392

views

32 bits dint to two 16bits dint

Asked 4 years ago by aerodriguez2010 Rank: 506

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication, 800xA > AC 800M, 800xA > Engineering > Control Builder M

1

answer

3

votes

668

views

ETH_MOD_MAST Limitations.

Answered 2 years ago by ak Rank: 173

PLC Automation > AC500 > _Other, DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication > Modbus > Modbus TCP

2

answers

2

votes

1131

views

converting IEEE-754 64-bit to integer

Asked 4 years ago by anders Rank: 556

DCS in general > Communication > Modbus, 800xA > AC 800M, 800xA > Engineering > Control Builder M

1

answer

1

votes

1145

views

PM564 COM1 Pin details for RS485 2 wire modbus connection

Asked 3 years ago by saurishkr Rank: 89

DCS in general > Communication > Modbus > Modbus RTU, PLC Automation > AC500-eCo

4

answers

2

votes

1584

views

Read/Write discrete Input/output using modbus tcp

Asked 4 years ago by Dannyf Rank: 3658

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication, 800xA > Engineering, PLC Automation > AC500 > CI modules > CI521, CI522 (Modbus TCP), PLC Automation > AC500

3

answers

0

votes

509

views

read separate registers in modbus

Commented 1 year ago by Tomas Rank: 316

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication > Modbus

3

answers

1

votes

1081

views

PM861 COM3 port pin details for RS232 communication.

Asked 3 years ago by saurishkr Rank: 89

DCS in general > Communication > Modbus > Modbus RTU, DCS in general > Communication > Modbus, 800xA > AC 800M, Freelance > Controllers > AC 800F > FI 820F (Serial)

3

answers

0

votes

1356

views

AC500 Modbus RTU Slave, adresses for input/output

Commented 2 years ago by kstoilov AKS expert

Rank: 5

PLC Automation > AC500 > _Other, DCS in general > Communication > Modbus

1

answer

1

votes

1189

views

Regarding %MW address problem in AC500

Asked 5 years ago by rajshasthri Rank: 1199

DCS in general > Communication > Modbus > Modbus TCP, PLC Automation > AC500 > CI modules > CI521, CI522 (Modbus TCP), PLC Automation > AC500

1

answer

1

votes

1470

views

CI867 Modbus TCP/IP slave

Asked 5 years ago by pauly25 Rank: 925

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP)

2

answers

4

votes

1535

views

Is it possible to have multimaster configuration in Modbus TCP/IP

Asked 5 years ago by gurwinder Rank: 1208

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication

7

answers

1

votes

1129

views

CI867 Hardware Configuration

Asked 3 years ago by ertug Rank: 700

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP), 800xA > AC 800M, 800xA

2

answers

2

votes

1473

views

com mod mast

Answered 11 months ago by Amal Rank: 88

DCS in general > Communication > Modbus > Modbus RTU, PLC Automation > AC500

4

answers

4

votes

823

views

Modbus Slave -MBRead giving timeout error -4929

Asked 4 years ago by Rajeesh Mariyodan Rank: 40

DCS in general > Communication > Modbus > Modbus RTU, 800xA > AC 800M > CI modules (other), 800xA > AC 800M

1

answer

1

votes

2383

views

CI867 AC800M Modbus TCP/IP Configured as a Slave?

Asked 6 years ago by bozomanuk Rank: 2208

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Software > Configuration, 800xA > AC 800M, 800xA > Engineering > Tools > Function Designer, 800xA > System > Administration & configuration > Configuration

1

answer

1

votes

1079

views

MODBUS communication Break

Asked 5 years ago by inripra Rank: 916

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication, DCS in general > Software > Configuration, 800xA > System > Administration & configuration > Configuration, Freelance > System > Administration & configuration > Configuration

2

answers

2

votes

727

views

start address for 40001

Asked 4 years ago by usman Rank: 732

DCS in general > Communication > Modbus > Modbus RTU, DCS in general > Control systems > Connectivity, 800xA > AC 800M, 800xA > Connectivities > 3rd party connectivity

1

answer

0

votes

990

views

Configure Modbus Slave address in Codesys

Asked 3 years ago by jarrett Rank: 589

DCS in general > Communication > Modbus, PLC Automation > AC500

4

answers

2

votes

905

views

CI867 - Modbus TCP error code -7006 (slave is a PC software)

Asked 3 years ago by quangbv.ctrl Rank: 1725

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP), 800xA

2

answers

3

votes

1451

views

Modbus, AC800M, PM860.

Asked 5 years ago by PM860 Rank: 1022

DCS in general > Communication > Modbus > Modbus RTU, DCS in general > Software > Configuration, 800xA > AC 800M, 800xA > System > Administration & configuration > Configuration

4

answers

1

votes

1603

views

how to configure com_mod_master to read a holding register?

Commented 7 months ago by Amal Rank: 88

DCS in general > Communication > Modbus > Modbus RTU, PLC Automation > AC500

2

answers

3

votes

1709

views

How do I in software configure AC500 as a Modbus TCP/IP slave

Asked 4 years ago by Aoo Rank: 1977

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Networking > Protocol > Ethernet, PLC Automation > AC500 > CI modules > CI521, CI522 (Modbus TCP), PLC Automation > AC500

3

answers

3

votes

437

views

reading a 32bit value from a modbus slave device using com_mod_mast

Commented 2 years ago by ak Rank: 173

DCS in general > Communication > Modbus > Modbus RTU

2

answers

1

votes

1093

views

Modbus TCP slave (PLC) Is diconnecting due to watchdog timer?

Asked 4 years ago by Aoo Rank: 1977

DCS in general > Communication > Modbus > Modbus TCP

1

answer

1

votes

668

views

800xA communication with Modbus TCP/IP,

Asked 4 years ago by Makk_ice Rank: 549

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Control systems > Connectivity, 800xA > Connectivities > 3rd party connectivity, 800xA > System > System version > 800xA 5.1 FP4

3

answers

3

votes

658

views

Modbus TCP Connection Down -7001

Asked 3 years ago by jeevan84 Rank: 666

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP), 800xA > AC 800M, 800xA

3

answers

12

votes

1465

views

AC500 ETH_MOD_MAST - how to close connection

Asked 5 years ago by adi2 Rank: 231

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication, PLC Automation > AC500 > CI modules > CI521, CI522 (Modbus TCP), PLC Automation > AC500

2

answers

2

votes

1232

views

Is it possible to directly monitor a boolean bit within an integer?

Asked 5 years ago by SamAI Rank: 1334

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M

6

answers

7

votes

5153

views

How to declare AC800M CI867 as Modbus TCP Master?

Commented 1 year ago by mtoshiokan Rank: 2888

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP), 800xA > AC 800M

10

answers

8

votes

2928

views

COMPACT HMI with Modbus TCP

Asked 7 years ago by csanchez411 AKS expert

Rank: 14

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Software > Configuration, 800xA > System > Administration & configuration > Configuration, Compact Product Suite > Operations > Compact HMI

2

answers

3

votes

1064

views

Modbus TCP/IP or OPC connection

Asked 3 years ago by hrksa Rank: 133

2

answers

0

votes

628

views

Using PLC connect for modbus TCP/IP

Asked 3 years ago by mayank roy Rank: 1261

DCS in general > Communication > Modbus > Modbus TCP, 800xA > Connectivities > 3rd party connectivity > PLC Connect

1

answer

0

votes

236

views

Modbus TCP Connection Down -7001

Answered 1 year ago by Kornelo Rank: 314

DCS in general > Communication > Modbus > Modbus TCP, 800xA > AC 800M > CI86x modules > CI867 (Modbus TCP)

2

answers

0

votes

664

views

Freelance Modbus TCP watchdog

Asked 4 years ago by jarrett Rank: 589

DCS in general > Communication > Modbus > Modbus TCP, DCS in general > Communication

1

answer

0

votes

633

views

Modbus TCP UnitID

Asked 4 years ago by tommiZ Rank: 915

DCS in general > Communication > Modbus > Modbus TCP, 800xA

1

answer

0

votes

1389

views

How to Configure the PM573 PLC to Intouch SCADA Communication

Asked 5 years ago by Balamurugan Rank: 2220

DCS in general > Communication > Modbus, DCS in general > Communication > OPC, 800xA > Connectivities > 3rd party connectivity > _Other, PLC Automation > AC500, PLC Automation > Supervisory software > DigiVis 500

2

answers

1

votes

1993

views

Modbus TCP/IP read 32 bit value

Asked 5 years ago by mshahabahmad Rank: 810

DCS in general > Communication > Modbus > Modbus TCP

AKS experts