This is the third episode of Weidmüller’s M4000 CPU article, this time in conjunction with Codesys and U-Remote modules. The module UR20-PF-O-1DI-SIL from Weidmüller can also be used to implement safety applications without a safety PLC.

Let’s get started.

Reference Link

Weidmüller#M4000_Part1_Factory Reset/Firmware update

Weidmüller#M4000_Part2_Let’t Install Codesys!

UR20-PF-O-1DI-SIL?

The power feed module UR20-PF-O-1DI-SIL can implement safe feed-in of the output current path. It can be used to monitor two-channel emergency stop command devices and, thanks to its 24 V safe output, can transfer the current status of the output current path to a PLC or switching device (e.g. relay) or can be further cascaded to a u-remote station.

The module must be manually initialized by giving a 0.1-2 s pulse to the “Man Start” input each time the module’s supply voltage is switched on.

The 24 V safe output path is automatically reactivated when the “Autostart” input is used, unless the module supply voltage has been interrupted.

Of course, there is also the ability to evaluate test pulses in safety circuits to detect faults and wiring operations.

Layout

This is the wiring diagram for UR20-PF-O-1DI-SIL.

LED

This is the LED meaning of UR20-PF-O-1DI-SIL.

Block Diagram

This is the Block diagram for UR20-PF-O-1DI-SIL. To activate the secure power feed module, follow the sequence below.

Connect the safety devices to S11 to S22 and disengage (unlock) the devices.
Connect the 24 VDC power supply to modules 4.3 and 4.4.
Switch on the u-remote station.
Operate manual start.

Process Data

This is Process Data for UR20-PF-O-1DI-SIL.

UR20-8DO-P

The UR20-8DO-P digital output module can control up to eight actuators at up to 0.5 A each. Status LEDs are assigned to each channel and the outputs are powered by the output current path (IOUT).

Layout

This is the wiring diagram for the UR20-8DO-P.

LED

This is the LED meaning of the UR20-8DO-P.

Block Diagram

This is a Block diagram of the UR20-8DO-P.

Process Data

This is Process Data for UR20-8DO-P.

UR20‐16DI‐P‐1

The UR20-16DI-P digital input module can detect up to 16 binary control signals. Four sensors can be connected to each connector in a one-wire configuration. In addition, a status LED can be assigned to each channel.

Layout

This is the wiring diagram for the UR20-16DI-P-1.

LED

This is the LED meaning of UR20-16DI-P-1.

Block Diagram

This is the Block diagram for UR20-16DI-P-1.

Process Data

This is Process Data for UR20-16DI-P-1.

UR20-4AI-UI-16

The UR20-4AI-UI-16 analogue input module can be configured with the following measurement ranges.

±10 V
±5 V
0 … 10 V
0 … 5 V
2 … 10 V
1 … 5 V
0 … 20 mA
4 … 20 mA。

Resolution is 16 bits per channel and sensors can be connected to 2-wire, 3-wire and 3-wire +FE. They are also protected against voltage surges and overcurrents.

Layout

This is the wiring diagram for the UR20-4AI-UI-16.

LED

This is the LED meaning of UR20-4AI-UI-16.

Block Diagram

This is the Block diagram for UR20-4AI-UI-16.

Process Data

This is Process Data for UR20-4AI-UI-16.

Measurement Range

This is the measurement range of the UR20-4AI-UI-16.

Implementation

To use Weidmüller modules on the M4000, modules can be added from the System_Bus in Codesys.

Configuration

This is the System Bus configuration screen of the M4000.

Set the alarm and Bus Cycle Time to match your application.

Device Manager

Next, add modules from the Device Manager section.

Slot1

Slot 1 is installed in UR20-8DO-P, so search for 8DO in Catalogue and Dorp UR20-8DO-P to M4000.

Done!UR20-8DO-P has been added.

Slot2

Slot 2 is installed in UR20-PF-O-1DI-SIL, so search for 1DI in Catalogue and Dorp UR20-PF-O-1DI-SIL to M4000.

Done!UR20-PF-O-1DI-SIL is added.

Slot3

Slot 3 is installed in UR20-16DI-P, so search for 16DI in Catalogue and Dorp UR20-16DI-P to M4000.

Done!UR20-16DI-P is added.

Slot4

Slot 4 has UR20-4AI-UI-16 installed, so search for 4AI-UI-16 in Catalogue and dorp UR20-4AI-UI-16 to M4000.

Done!UR20-4AI-UI-16 is added.

Result

This is the System_Bus set up in this article.

Add GVL

To add a Global Variable List, go to Application>Right click>Add Object>Global Variable List.

Enter the GVL name.

Define the modules installed in System_Bus and the variables to be Mapped as shown in the diagram below.

Program

FB_UR20_PF_O_1DI_SIL

This is the Function Block that controls the UR20-PF-O-1DI-SIL.

Interface

This is the Interface definition of the Function Block.

FUNCTION_BLOCK FB_UR20_PF_O_1DI_SIL
VAR_INPUT
END_VAR
VAR_OUTPUT
qSafetyInput0 :BOOL; //1=Activate
qAutoStartActived :BOOL; //1=Activate
qManualStartActived :BOOL; //1=Activate
qSafetyInputChannel0:BOOL; //S12,S12
qSafetyInputChannel1:BOOL; //S21,S22
q24VSafetyOutput :BOOL; //24V Safety
q24VDCSupply :BOOL; //24V
END_VAR
VAR_IN_OUT
ioByte0,ioByte1:BYTE;
END_VAR
VAR
END_VAR

Code

Rung1-4 transfers Bit0-3 of Byte 0 to the output variable.

Rung5-8 transfers Bit4-5 of Byte0 and Bit0 and 2 of Byte1 to the output variable.

MAIN

This is the MAIN POU.

Interface

PROGRAM PLC_PRG
VAR
SwitchLamp :BOOL;
Channel0_Voltage:REAL;
Channe11_Current:REAL;
Module1 :FB_UR20_PF_O_1DI_SIL;
SwitchNO,SwitchNC:BOOL;
END_VAR

Code

This one scaling the analogue inputs with current and voltage values and also calls the Function Block of UR20-PF-O-1DI-SIL, which was created earlier, to obtain the state of UR20-PF-O-1DI-SIL.

Channel0_Voltage:=
(TO_REAL(GVL_SystemBus.Slot4[0])/27648.0)*10;

Channe11_Current:=
((TO_REAL(GVL_SystemBus.Slot4[1])/27648.0)*20)+4;

Module1(
ioByte0:=GVL_SystemBus.Slot2[0]
,ioByte1:=GVL_SystemBus.Slot2[1]
);

SwitchNC:=GVL_SystemBus.Slot3[0].0;
SwitchNO:=GVL_SystemBus.Slot3[0].2;

SwitchLamp:=SwitchNO;

GVL_SystemBus.Slot1.0:=SwitchLamp;