Watlow Series 922 Retrofit Manual de usuario descargar pdf (Pagina 49)

How To Program the Series 922, Chapter 6

WATLOW Series 922 User's Manual

Nested Loop

A "Nested" loop is a jump loop within a loop. You are forced to a step either

forwards or backwards from your present location. When nested loops are

performed, they cannot break across other loops. Your JC can be from 0 - 100

with 0 being an infinite looping.

Step 1 SETPOINT

Step 2 SETPOINT

Step 3 JUMPLOOP JS - 02 JC - 01

Step 4 JUMPLOOP JS - 01 JC - 01

Step 5 SETPOINT

Step 6 JUMPLOOP JS - 01 JC - 01

Step 7 STOP

The steps in sequence will be: 1, 2, 3, 2, 3, 4, 1, 2, 3, 2, 3, 4, 5, 6, 1, 2, 3, 2, 3,

4, 1, 2, 3, 2, 3, 4, 5, 6, 7.

Intertwined Loop

An "Intertwined" loop can break across other loops.

Step 1 SETPOINT

Step 2 SETPOINT

Step 3 JUMPLOOP JS - 01 JC - 01

Step 4 JUMPLOOP JS - 02 JC - 01

Step 5 STOP

The steps in sequence will be: 1, 2, 3, 1, 2, 3, 4, 2, 3, 1, 2, 3, 4, 5.

Rules to Follow

The one basic rule that you must follow is that you can only have a

maximum of three consecutive jump loops.

Step 1 SETPOINT

Step 2 JUMPLOOP JS - 01 JC - 01

Step 3 JUMPLOOP JS - 01 JC - 01

Step 4 JUMPLOOP JS - 01 JC - 01

Step 5 JUMPLOOP JS - 01 JC - 01

Step 6 STOP

Your program will run until it reaches Step 5, and flashes an ER2 0039. This

is the infinite looping error, and means you have too many consecutive loops.

Another rule to follow is you cannot JUMPLOOP to a step you are on. You'll

receive an ER2 0039. Clear the error in the ER2 parameter under the SYS-

TEM menu and retransmit your data.

Use simple loops in your program!

Jumploops

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 126 127

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Watlow Series 922 Retrofit Manual de usuario Pagina 49