This article explains the procedure for connecting the Phoenix Contact PLCNEXT AXCF2152 and the Phoenix Contact AXL E PN IOL4/0 DIO8 M12 6M-L via Profinet. The following is the IO-Link device used in this setup:

AXL E IOL DIO8 M12 3M
PSD-SC IOL S15 AE

Alright, let’s enjoy the FA!

Reference Link

Siemens#Let’s connect the Phoenix Contact AXL E PN IOL4/0 DIO8 M12 6M-L via Profinet!

Siemens#Let’s Dynamically Rewrite AXL E PN IOL4/0 IO-Link Parameters Using the LIOLink Library!

MEMORY_COPY

The MEMORY_COPY function used in this article copies data between data areas in the runtime system, transferring a specified number of bytes from the source data area to the destination data area.

Parameter Description

SRC

Data type：ANY
Description：Data area of the source
Note：
- You can specify an array element like `MyArray[5]`
- However, in that case, it refers to that specific element rather than the beginning of the entire array

SRC_OFF

Data type：ANY_INT
Description：Byte offset from the start of the source data area
Conditions： greater than or equal to 0

DST

Data type：ANY
Description：Destination data area
Note：
- You can specify `MyArray[5]`
- However, this refers only to that specific element, not the starting position of the entire array

DST_OFF

Data type：ANY_INT
Description：Byte offset from the start of the destination data area
Conditions：greater than or equal to 0

CNT

Description：Number of bytes to copy

Output（OUT）

Data type：UINT
Description：Copy operation status codes

OUT Value	Description
0	Completed successfully
1	Invalid VAR_IN_OUT descriptor for SRC or DST (internal error)
2	SRC size insufficient, or SRC_OFF is invalid (CNT exceeds SRC – SRC_OFF)
3	DST size insufficient, or DST_OFF is invalid (CNT + DST_OFF exceeds destination size)
12	CNT value is out of range

Error behavior

If OUT ≠ 0, an error code is returned
When an error occurs:
- ENO = FALSE
- The copy operation is treated as a failure

How EN / ENO Works

EN = TRUE：To execute POU
EN = FALSE：POU is not executed, and ENO = FALSE
Even if an error occurs during execution, ENO = FALSE

Implementation

Let’s go ahead and create a project.

PLCNEXT Side

First, we will set up the PLCNEXT AXCF2152.

Scan the PLCNEXT controller

Click on Project ICON.

In Project → Online Controllers, click the icon below to search for devices on the network.

Done!I searched for AXCF 2152. Right-click on AXCF 2152 and click “Add to Project.”

The controller selection screen will appear.

The version of AXCF 2152 used in this article is 2025.6.

Click OK.

Enter the username and password for the AXCF 2152 unit.

Done!

Importing GSDML

To import GSDML from the PLCNEXT Engineer tool, click File → Import → Import GSDML Files.

Open the GSDML file you just downloaded.

Click OK.

Profinet Network Setup

Next, to set up a Profinet network, open Project → Profinet.

I will now insert the AXL E PN IOL4/0 DIO8 M12 6M-L used in this article.

And you can Right Click->Delete Variable(PLC) to delete the variables that are not used in the project.

IP Address and Device Name

Next, set the device name to AXL E PN IOL4/0 DIO8 M12 6M-L.

Configure the IP address and device name for the AXL E PN IOL4/0 DIO8 M12 6M-L in the box shown below.

Next, set “Auto Negotiation” to NO on Port 1 and Port 2 of the AXL E PN IOL4/0 DIO8 M12 6M-L.

Also, since there are no Profinet devices connected to Port 2 of the AXL E PN IOL4/0 DIO8 M12 6M-L, set the “Check MAU Type” for Port 2 to “No.”

Slots

Next, we will configure the slot for the AXL E PN IOL4/0 DIO8 M12 6M-L.

The red box in the figure below shows the current slot settings for the AXL E PN IOL4/0 DIO8 M12 6M-L. By default, Ports 1 through 4 are configured as digital inputs.

Next, we will change the settings from PLCNEXT Engineer to Slot.

Set the number of Byte IN/OUTs according to the IO-Link devices connected to each port.

Done!Also, set the last PORT to Phoenix Contact’s AXL E IOL DIO8 M12 3M.

IO-Link Device Parameters

In addition, you can set individual initial parameters for the IO-Link devices connected to each IO-Link port.

DUT

Define arrays of 4 bytes, 3 bytes, and 1 byte in the project.

TYPE udtArray4Bytes : ARRAY[0..3] OF byte; udtArray3Bytes : ARRAY[0..2] OF byte; udtArray1Bytes : ARRAY[0..0] OF byte; END_TYPE

Next, to declare global variables in PLC Next Engineer, click Project → IEC 61131-3.

Define the variables required for the project.

To add a new variable, right-click and select “Add Variables.”

fbshitbits

This Facebook post features a program that stacks bits while shifting them left or right on the rising edge of an XSHIFT signal.

Variable	Type	Description
xshift	BOOL	Shift execution trigger
xdirection	BOOL	FALSE = Left shift / TRUE = Right shift
bValue	BYTE	Bit pattern output
iCount	INT	Shift counter
iresetOffset	INT	Number of shifts before reset
fbR_TRIG	R_TRIG	Rising edge detection

Initial state: 0000_0001

1st iteration: 0000_0011

2nd iteration: 0000_0111

3rd iteration: 0000_1111

↓

Reset → 0000_0001

This is how the sequence progresses.

fbR_TRIG(CLK:=xshift); if fbR_TRIG.Q then if not xdirection then IF iCount < iresetOffset THEN bValue := SHL(bValue, 1) OR byte#1; iCount := iCount + 1; ELSE iCount:=0; bValue:=1; END_IF ELSE IF iCount < iresetOffset THEN bValue := SHR(bValue, 1) OR byte#1; iCount := iCount + 1; ELSE iCount:=0; bValue:=1; END_IF end_If; end_if;

MAIN

Next, to create the MAIN program, go to PLC ENGINEER → right side → COMPONENTS → Programs → Create New Program.

This program performs bit shifts at two different frequencies and outputs the results to a PROFINET device (Axioline E I/O-Link module).

wControlWord (0.1s cycle) – flowing pattern:

0000_0000_0000_0001

0000_0000_0000_0010

0000_0000_0000_0100

↓ (1 bit shifts)

1000_0000_0000_0000

↓ reset

0000_0000_0000_0001

bControlByte (1s cycle) – accumulating pattern:

0000_0001

0000_0011

0000_0111

0000_1111

↓ reset (upon reaching 4 shifts)

0000_0001

fbTimer(in:=not fbTimer.Q,PT:=T#0.1s);
fbTimer2(in:=not fbTimer2.Q,PT:=T#1s);

if wControlWord=0 THEN
wControlWord:=1;
end_if;

if wControlWord.%X15 THEN
wControlWord:=1;
end_if;

if bControlByte=0 THEN
bControlByte:=1;
end_if;

if bControlByte.%X7 THEN
bControlByte:=1;
end_if;

if fbTimer.Q THEN
wControlWord:=SHL(wControlWord,1);

end_if;

uiCopyout:=
MEMORY_COPY(
wControlWord
,0
,axl_e_pn_iol4_0_dio8_2_2_OUT
,0
,2
);

fbshitbits(
bvalue:=bControlByte
,xdirection:=false
,xshift:=fbTimer2.Q
,iresetOffset:=4
);

axl_e_pn_iol4_0_dio8_2_5_OUT[0]:=bControlByte;
axl_e_pn_iol4_0_dio8_2_3_OUT[2]:=bControlByte;

Add a program to a task

Next, let’s configure the program to run in Runtime. Click PLCnext here.

Let’s add the program we just added to the Task.

Connection

To connect to the PLC ENGINEER and AXF2152, select the PLC, right-click, and choose “Connect/Disconnect.”

Download

Next, click “Write and start Project (With sources)” to download the program to the AXF2152.

Results

To check the Profinet communication status of the AXF2152, access the AXF2152 Web Server and open the “Overview” page. As shown in the figure below, communication is OK as long as BF-C is not red.