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Volume Ⅱ
1
1.1
PLC Programming and Connection
Sequence Program Creating Process
GSK25i PLC specifications
Specification of GSK25i PLC are as follows(see Table 1-1):
Table 1-1
GSK25i
Specification
Ladder, command table
Number of ladder level
2
st
1 level execution period
8ms
Mean processing time of basic command
0.5(μs/step)
Program capacity
12000 steps
Command
P：10
Functional command：44
Internal relay （R）
Data table （D）
Meter （C）
Timer （T）
PLC alarm detection （A）
Keep relay （K）
Label
（L）
Subprogram
（P）
Machine →PLC(X)
PLC→machine (Y)
CNC→PLC(F)
PLC→CNC(G)
1.2
PLC
Programming method language
1100 bytes（R0 to R1099）
1860 bytes （D0 to D1859）
400 bytes （C0 to C399）100PCS
200 bytes （T0 to T199）100PCS
32 bytes(A0 to A31)
32 bytes(K0 to K31)
9999（L1～L9999）
512（P1～P512）
128 bytes（X0 to X127）
128 bytes （Y0 to Y127）
256 bytes （F0 to F255）
256 bytes （G0 to G255）
What ’s a Sequence Program
A sequence program is a program for sequence control of machine tools and other systems.
The program is converted into a format to enable CPU execute encoding and arithmetic
processing, and stored into RAM. CPU reads out every instruction stored in the memory at a
high-speed and execute the program by arithmetic operation
The sequence program is written firstly from ladder.
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