This is the fourth episode of the Pilz PSS4000 introduction. In the previous article, I explained the concept of creating a Safety program, variables, etc. This time, I would like to put together a more practical program. This time I will show you how to build a simple ESTOP safety application using the Function Block FS_EmergencyStop of the Pilz PSS4000.

Let’s start!

Thanks!

PSSu H PLC1 FS SN SD is borrowed from Pilz Japan, Thanks !!

PILZ

PILZ supports FA sites as a total solution supplier with safety and automation technology solutions, guaranteeing not only human safety, but also machine and environmental safety, to ensure the safe operation of machines and equipment. Pilz has 42 local companies and branches worldwide and is active in various fields such as packaging, the automotive industry, robotics applications, as well as wind power and railway technology.

Office:

ピルツジャパン株式会社

〒222-0033

横浜市港北区新横浜3-17-5

いちご新横浜ビル 4階

HP

https://www.pilz.com/ja-JP

Reterence Link

Pilz#Part01_Let’s start with PSS4000 PSSu PLC!

Pilz#Part02_Your First PSS4000 PLC Program

Pilz#Part03_Your First PSS4000 Safety PLC Program

Function Block

Firstly, Function Block – FS_EmergencyStop can implement 1:1 or 1:2 ESTOP operation applications for ETOP. It is important to note that to achieve the highest catalogs using FS_EmergencyStop, the ESTOP must be Dual Wiring, and the Test Pulse function must be enabled.

Parameters Type

Before introducing FS_EmergencyStop, let’s first discuss the Parameters of Pilz’s Function Block.

Parameters Points

The ICON square on the left side of Pilz’s Function Block is called “Parameter Points. In other words, they are input parameters.

I-Connection point

The right side of Pilz’s Function Block, the linear ICON, is called the I-Connection point. In other words, it is an output parameter.

I-PI point/O-PI point

The semicircle ICON on the left side of the Function Block in Pilz is called I-PI point or O-PI point. This parameter is directly connected to IO Mapping.

VAR_INPUT

Variable	Data Type	Description
SwitchType	SAFESINT	Switch Type 1 = 1 NC contact, 3 = 2 NC contactsThe SwitchType parameter should not be changed while the CPU is running. (DiagInputNotValid will be True)
InputNC1	SAFEBOOL	Switch Input signal 1, True = NC contact Close
InputNC2	SAFEBOOL	Switch Input signal 2, True = NC contact Close
AutoStart	SAFEBOOL	True=Automatic error activation, Default=False
AutoReset	SAFEBOOL	True=Automatic error activation, Default=False
MonitorReset	SAFEBOOL	Function Block reset signal detection settingFalse=Reset by Up Edge True=Reset by Down EdgeDefault=True
StartupTest	SAFEBOOL	Do not perform Function Test when False=StartupTrue=Function Test on StartupDefault=True
SimultaneityTime	Time	Detection time of InputNC1 and InputNC2 signals simultaneously True and False
DelayTime	Time	DelayTime for InputNC1 and InputNC2
Reset	BOOL	error reset

VAR_OUTPUT

Variable	Data Type	Description
Enable	SAFEBOOL	True=No Error, ESTOP is not working
DiagOperated	SAFEBOOL	True=ESTOP not working
DiagReadyForReset	SAFEBOOL	True=ESTOP can be reset
DiagSwitchError	SAFEBOOL	True = Two NC contacts cannot be turned off and on simultaneously within a set time period.
DiagInputNotValid	SAFEBOOL	True=InputNC1/InputNC2 signals are disabled

Application Example

SwitchType=1

SwitchType=3,Switch on/off time=3s

Wiring

Implementation

Programming

Now, continuing from the previous article, expand IEC 611313 programming>POU_2[PRG].

The Ladder Editor is now displayed.

Search for “STOP” in the right palette and you will find the FS_EmergencyStop Function Block.

Select FS_EmergencyStop and add it to the new Network.

Here is the operation.

Define

Next, in the VAR area, define the Instance of FS_EmergencyStop and the SwitchType in the VAR CONSTANT.

Assign

Assign the Instance defined previously to the FS_EmergencyStop Function Block.

Next, put in the necessary parameters – SwitchType and SimultaneityTime.

Output

Using the Enable output of the Function Block (i.e., ESTOP normal and the signal is also in True), Pilz PLC’s ESTOP turns on its own lamp and the lamp of the reset switch.

IO Mapping

As I mentioned, there is no case to assign ESTOP signal parameters to FS_EmergencyStop, right? Remember I mentioned at the beginning that there are three types of parameters in the Pilz Function Block: InputNC1/InputNC2/Reset, and those three signals are I-PI Point signals that must be assigned directly from I/O Mapping.