Types of Control Expert Function Block Instances of SFBs

Introduction

For Premium, an instance is converted to an instance.

For Modicon M340, an SFB instance is converted to a DFB instances.

The DFB types used for Modicon M340 have the same name as the EFB types used for Premium.

Types of instances

The following table, which is valid for both families, shows the types of instances.

SFB		Types of Control Expert instances
%T		PL7_3_TIMER
%TM	TON	PL7_TON
	TOF	PL7_TOF
	TP	PL7_TP
%C		PL7_COUNTER
%MN		PL7_MONOSTABLE
%R	%Ri.LEN ≤ 32	PL7_REGISTER_32
%R	32 < %Ri.LEN ≤ 255	PL7_REGISTER_255
%DR		PL7_DRUM (1)

Key:
(1)	The PL7_DRUM EFB contains an extra output parameter compared with the PL7 %DR instance type. Note: A PL7_DRUM is converted in Modicon M340 applications to an empty DFB.