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11 INSTRUCTIONS AND FUNCTIONS
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• The maximum number of steps in the sequence program is determined by the
capacity set by the parameter. The allowable specification range for the starting step
number is as follows:
Sequence program
Setting value of T0
Setting value of T1
Setting value of T255
Setting value of C0
Setting value of C1
Setting value of C255
Step 0
Step 1
Step 30718
How to calculate the specified step
(1) Starting step number when a timer setting value is specified
FE00
+ the device number of the timer (expressed in hexadecimal)
H
(2) Starting step number when the counter setting value is specified
FF00
+ the device number of the counter (expressed in hexadecimal)
H
(3) Starting step number when the sequence program itself is specified
0000
+ sequence program step number (expressed in hexadecimal)
H
• The maximum number of sequence program steps that can be read at one time is 64
steps. The entire program can be read by specifying the starting step number and
the number of steps to be read in units of 64 steps as follows:
Sequence program area
0
64
128
192
Specified step
to
to
to
Specify
%(3)=&H0,
Specify
%(3)=&H40,
Specify
%(3)=&H80,
&HFE00
&HFE01
to
&HFEFF
&HFF00
&HFF01
to
&HFFFF
&H0000
&H0001
to
&H77FE
%(4)=64.
%(4)=64.
%(4)=64.
MELSEC-Q
11 - 288
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