Emerson Bettis RTS Manual de usuario

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0

July 2021

Bettis RTS

Connectivity with Modbus TCP

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0

Notes

July 2021

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Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0

Table of Contents

July 2021

Table of Contents

Section 1: General

General ................................................................................................................... 1

Section 2: Topology

Topology................................................................................................................. 2

Section 3: Connection

Connection............................................................................................................. 3

Section 4: Settings

Settings .................................................................................................................. 4

Section 5: Description of Input and Output Data

5.1 Register Assignment for the Input Data (Data from Master to Slave).............. 5

5.1.1 Set Point............................................................................................. 5

5.1.2 Command .......................................................................................... 6

5.1.3 Command 2 ....................................................................................... 7

5.2 Modules for the Output Data (Slave to Master).............................................. 8

5.2.1 Actual Value ....................................................................................... 8

5.2.2 Status................................................................................................. 9

5.2.3 Actual Torque..................................................................................... 9

5.2.4 Actual Speed .................................................................................... 10

5.2.5 Ext. Actual Value .............................................................................. 10

5.2.6 Status 2 ............................................................................................ 10

5.2.7 Status 3 ............................................................................................ 11

5.2.8 Status 4 ............................................................................................ 11

Table of Contents

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0

Notes

July 2021

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Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0 July 2021

Section 1: General

A eldbus interface for the Modbus TCP bus system is available for Emerson actuators

in the Bettis RTS Series of Electric Actuators. Modbus TCP is an Ethernet-based eldbus

system. This interface is a hardware option and should already be known when ordering

the actuator.

General

July 2021

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0

Section 2: Topology

Since two ports are executed on the additional board for the Modbus TCP, the following

network topologies can be implemented:

• Line structure

• Tree structure

• Star structure

• Ring structure (if supported by the master)

• Mixed forms

Example:

Figure 1 Topology

Topology

Hub

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Field

Device

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0 July 2021

Section 3: Connection

The connection of the RTS Control Unit to the Modbus TCP is done at the eld level

because of the high degree of protection required via 4-pin, D-coded, M12 connectors

(see IEC 61076-2-101). The female side is on the device, and the male side on the cable side.

Two equivalent M12 connectors, which are internally wired to a hub, are located on the

RTS Control Unit with Modbus TCP. With this, a line structure can be implemented. Which

connection is used is irrelevant for the function.

Figure 2 Pin assignment on device side (female side)

Table 1.

The devices are connected via crossover cables, i.e.:

• Tx+ to Rx+

• Tx- to Rx-

• Rx+ to Tx+

• Rx- to Tx-

The cable types recommended are standard patch cables (twisted pair, S/UTP, AWG26,

Cat5e). The cable shield has to be connected to the actuator housing over the connector

housing. It is important to ensure that there are no potential differences between the

individual devices in the Modbus TCP network so that no transient currents ow over the

cable shield.

Section 3: Connection

Pin Function

1 Tx+

2 Rx+

3Tx-

4Rx-

Connection

July 2021

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0

Section 4: Settings

The following additional parameters become visible in the control unit for the Bettis RTS

electric actuator with the Modbus TCP option enabled.

Table 2.

item

Sub-menu

item Poss. setting Notes/comments

P15.1 Bus Modbus TCP

0: inactive Modbus TCP disabled.

1: xed IP The actuator has a xed IP address (parameters P15.2 and

P15.3 have to be parametrised correctly).

2: DHCP The actuator receives its IP address from the DHCP server.

3: BOOTP The actuator receives its IP address from the BOOTP server.

P15.2 Bus IP Address 0 to 125 Valid IP address (only relevant if P15.1 is set to 1 (xed IP))

P15.3 Bus Net Mask 0 to 125 Valid net mask (only relevant if P15.1 is set to 1 (xed IP)).

P15.4 Bus Swap Bytes 0, 1 Swap the low and high bytes in registers.

P15.6 Bus Watchdog

time

0.0 – 10.0 s

(0.0 s)

Monitoring of the toggle bit transmitted from the master

(bit 7 in the command). With a bus watchdog time set, this

bit has to toggle within that time; otherwise there is a bus

watchdog fault. At 0.0 s the watchdog function is disabled,

in which case toggling of the toggle bit may be omitted.

P15.7 Bus Sollwertquelle

(0): Standard The set point is specied via the Modbus TCP

(only relevant when the positioner is enabled).

1: Analog The set point is specied by the analog signal

(only relevant when the positioner is enabled).

2: Bus/analog

With an error-free bus, the set point is specied via the

Modbus TCP. With a bus error, the analog value is switched

to (only relevant when the positioner is enabled).

P15.8 Bus Status 2 (0) Standard assignment for Status 2.

1 - 2 Reserved for future use.

P15.9 Bus Status 3 (0) Standard assignment for Status 3 (current event).

1 - 2 Reserved for future use.

P15.10 Bus Status 4 (0) Standard assignment for Status 4 (current event).

1 - 2 Reserved for future use.

! WARNING

After changing parameters P15.1 - P15.3, the protocol stack for the Modbus TCP is

restarted to apply the change.

! WARNING

To allow the actuator to be unambiguously identied in the network, the MAC address is

displayed in the bottommost line of Status Area S5!

Settings

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0 July 2021

Section 5: Input and Output Data

Section 5: Description of Input and

Output Data

General information: Depending on the master, it is possible that the low byte (bits 0 - 7)

and the high byte (bits 8 - 15) have to be swapped in the registry values. This swapping can

be done by the control unit with parameter P15.4.

The transmission mode (big endian/little endian) always has to be adjusted such that the

analog values are transmitted correctly. Only then can the binary data be swapped.

5.1 Register Assignment for the Input Data

(Data from Master to Slave)

The register values can be written with functions 6 (06Hex: Write single register):

and 16 (10Hex: Write multiple registers).

The register values can be read back with function 3 (03Hex: Read holding register).

! WARNING

Depending on the master, the register numbers are assigned with an offset! For example,

5.1.1 Set Point

Registry number: 0Hex

Data format: 16-bit, the lower 10 bits (0 - 1023) are used.

The other bits are reserved for future use and must be set to zero!

Structure:

Table 3.

Value Function Description

0 (0Hex) 0%

512 (200Hex) 50%

1023 (3ffHex) 100%

Input and Output Data

July 2021

Installation, Operation and Maintenance Manual

VCIOM-15517-EN Rev. 0

Section 5: Input and Output Data

5.1.2 Command

Registry number: 1Hex

Data format: 16-bit (bit eld)

Structure:

Table 4.

Bit

no. Function Description

Bit= 0 Bit=1

0OPEN - OPEN command in REMOTE mode

1 CLOSE - CLOSE command in REMOTE mode

2STOP - STOP command in REMOTE mode

3NOT-AUF - EMERGENCY OPEN command in LOCAL and REMOTE modes

4NOT-ZU - EMERGENCY CLOSE command in LOCAL and REMOTE modes

5 BLOCK -

BLOCK drive in LOCAL and REMOTE modes. The drive is not

operable either via the selector switch locally nor via commands

by REMOTE nor Modbus TCP

6CONTROL

INHIBIT -CONTROL INHIBIT in REMOTE mode engagement of the

positioner is suppressed

7 WATCHDOG

Toggle bit from the master for bus watchdog monitoring

With bus watchdog time set, the bit has to toggle within this time;

otherwise there is a bus error

8 OPEN-SH - OPEN command with self-retention in REMOTE mode jettison

with STOP

9 CLOSE-SH - CLOSE command with self-retention in REMOTE mode jettison

with STOP

10 LOCKING- OPEN -

Trigger locking OPEN (in LOCAL and REMOTE modes) the drive

runs OPEN with highest priority, the command continues to

queue internally even after reaching the OPEN end position.

Jettison only with LOCKING OFF, supply off or OFF mode

11 LOCKING- CLOSE -

Trigger locking CLOSED (in LOCAL and REMOTE modes)

the drive runs CLOSED with highest priority, the command

continues to queue internally even after reaching the CLOSED

end position. Jettison only with LOCKING OFF, supply off or

OFF mode

12 LOCKING OFF - Jettison locking

13 BLOCK LOCAL - BLOCK drive in LOCAL mode

The drive is not operable via the selector switch locally

14 FAIL-SAFE - Trigger the fail-safe unit (if there is one)

15 OVERRIDE - Binary inputs are not processed

Input and Output Data

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