© Microsoft           © SIEMENS

 

 

 

 

 

 


                To exploit completely advantages of Actuator Organizer or AI Organizer the I/Os must be labeled according

appropriate rules, which are integrated in algorithm assigning I/Os to STEP 7 FC block at their calls. Symbol name for

I/O is combined with two parts. Leading part is the actuator name and second part is an extension according to

the meaning of  I/O. Meaning of I/Os and their extensions are described in the table bellow.

 

Form of I/O label MUST BE KEPT !

 
 

 

 

 


Signals from measuring devices

 

1-st letter

D

Density

E

Electrical values (current,tension, power ...)

F

Flow

G

Position, length

H

Weight

L

Level

M

Humidity

P

Pressure

Q

Analyzaa of medium

R

Radioaktivity, radiation

S

Speed, frequency

T

Temperature

V

Viscosity

W

Mechanical power, weight

X

The other values

Y

Vibration

 

 

Type of I/O signal

 

2-nd letter

I

Analog input to PLC

O

Analog output to PLC

X

Digital input to PLC

Y

Digital output to PLC

 

 

 

 


Signals for acctuators ( DI, DO )

 

1-st letter

Q

Status

C

Status from frequency converter

K

Order

H

Signalization of status or non standart function

L

Operator order from the local control box

 

 

Meaning of I/O signal

 

2-nd letter

A

Up

B

Down / Backward

C

Mode computer

D

Local mode

E

Release

F

Failure

G

Position, length

H

Maximum

J

Control voltage

L

Minimum

M

Reset

N

Emergency stop

O

Overload

P

Turns , frequency

R

Ready

S

Services switch

T

Open, opened

U

Close, closed

V

Off / STOP

W

Setpoint

Z

On / Start / Forward

 

 

 

Example :

 

 

 

 

 

 

 

 


Valve V101

 

DO order Open       DI Opened               DI Closed                Local control

 

V101_KT                V101_QT                V101_QU                V101_QD

 

 

 

 

Pump M102

 

DO order Start        DI Running              DI control volt.OK    DI motor protection

 

M102_KZ               M102_QZ               M102_QJ*              M102_QF *

 

 

* - logical 0 ... Motor protection is active, motor is switched OFF, FAULTY state              

  - logical 1 ... Motor protection is OK. Motor is running. Normal state. Control voltage is ON.