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Chapter 10 High-Level Positioning Control
10.3 Setting the block start data
10.3.1 Relation between various controls and block start data
The "block start data" must be set to carry out "high-level positioning control". The
setting requirements and details of each "block start data" item to be set differ
according to the "[Da.13] Special start instruction" setting.
The following shows the "block start data" setting items corresponding to various
control systems. The operation details of each control type are explained starting in
Section 10.3.2. Also refer to Section 10.4 "Setting the condition data" for details on
"condition data" with which control execution is judged.
(The "block start data" settings in this chapter are assumed to be carried out using
GX Works2.)
High-level positioning
control
Block start data
setting items
Block start
(Normal
start)
Condition
start
Wait start
Simulta-
neous start
Repeated
start
(FOR loop)
Repeated
start
(FOR
condition)
NEXT start
[Da.11] Shape
0 : End
1 : Continue
[Da.12] Start data No. 1 to 600
[Da.13]
Special start
instruction
0 1 2 3 4 5 6
[Da.14] Parameter – Condition data No.
Number of
repetitions
Condition
data No.
–
: One of the two setting items must be set.
: Set as required (Set to "–" when not used.)
: Setting not possible
– : Setting not required (The setting value is invalid. Set the initial value or a value within the setting range.)
The "NEXT start" instruction is used in combination with "repeated start (FOR loop)" and "repeated start (FOR
condition)". Control using only the "NEXT start" will not be carried out.
REMARK
It is recommended that the "block start data" be set whenever possible with
GX Works2. Execution by sequence program uses many sequence programs and
devices. The execution becomes complicated, and the scan times will increase.