KEYENCE Visual KV Series - Manual (Page 25)

Chapter 1
Programming
This chapter describes basic knowledge including program creation procedures,
device configuration, relay assignments, special functions to set and confirm Visual
KV Series operations, as well as the extended ladder diagrams. Understand the
contents described here completely at first before creating programs.
➮ For a detailed description of instructions, refer to "2.4. Instruction Details" (p.3-56).
1.1 Before Creating Programs .......................................................... 3-2
1.1.1 Flow from Introduction to Operation ........................................................... 3-2
1.1.2 Scan Time .................................................................................................. 3-3
1.2 User Memory ................................................................................ 3-4
1.2.1 Program Capacity ...................................................................................... 3-4
1.3 Device Configuration ................................................................... 3-5
1.3.1 Device List .................................................................................................. 3-5
1.3.2 Relay No. ................................................................................................... 3-7
1.3.3 Assigning Relay Nos. ................................................................................. 3-8
1.3.4 Input Relays ............................................................................................... 3-9
1.3.5 Output Relays .......................................................................................... 3-10
1.3.6 Internal Utility Relays ............................................................................... 3-11
1.3.7 Special Utility Relays ................................................................................ 3-12
1.3.8 Special Utility Relay List ........................................................................... 3-14
1.3.9 Timers and Counters ................................................................................ 3-18
1.3.10 Data Memories ......................................................................................... 3-19
1.3.11 Temporary Data Memory ......................................................................... 3-21
1.3.12 Relay Nos. and Functions ........................................................................ 3-22
1.4 Special Functions ...................................................................... 3-23
1.4.1 Input Time Constant Change Function .................................................... 3-23
1.4.2 Modifying the Input Relay Time Constant ................................................ 3-24
1.4.3 Constant Scan Time Mode ....................................................................... 3-25
1.4.4 Output Disabled Function ......................................................................... 3-26
1.4.5 Input Refresh Disabled Function .............................................................. 3-26
1.4.6 Contact Comment Save Function ............................................................ 3-27
1.4.7 Special Functions ..................................................................................... 3-28
1.5 Extended Ladder Diagrams ...................................................... 3-29
1.5.1 Features of Extended Ladder Diagrams .................................................. 3-29
1.5.2 Advantages of Extended Ladder Diagrams ............................................. 3-30
1.5.3 Example of an Extended Ladder Diagram ............................................... 3-31
KVNKA Chap 01P.p65 08.3.11, 11:49 AM 1