
B-62924EN/04 OPERATION 1.16i/18i/21i-A/B, Power Mate i-D/H, AND 16/18-C
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- Calculation for station Nos. 3 to 5:
294+50×(3-1)+1.0×(244+244+244)=1126≥1000
→ The values of N and SIZE are cleared.
• Second ITP process
- Calculation for station Nos. 5 to 6:
294+50×(2-1)+1.0×(244+244)=832≤1000
→ The ITP process count (n) is determined to be 2 and
calculation for all communication slave stations is
complete.
Thus, Z: One-scan time within the CNC is 8 msec for this example.
When both the master and slave functions are used together
In this case, the data refresh time is similar to that described in "When
only the master function is used" above.
However, SIZE: DI/DO data size in expression (A) is as follows:
SIZE = SIZE
mas
+ SIZE
slv
SIZE
mas
: DI/DO data size for the master function
SIZE
slv
: DI/DO data size for the slave function
Example of calculating Z: One-scan time within the CNC)
[Conditions]
• CNC model: 16i/18i/21i-A/B
• Communication slave station settings for the master function :
- DI/DO size set for station No. 3 = 122/122
- DI/DO size set for station No. 4 = 122/122
- DI/DO size set for station No. 5 = 122/122
- DI/DO size set for station No. 6 = 122/122
• Settings for the slave function : DI/DO SIZE = 50/50
[Calculation]
• First ITP process
- Calculation for station Nos. 3 and 4:
294+50×(2-1)+1.0×(244+244+100)=932≤1000
→ N and SIZE indicate the maximum values.
- Calculation for station Nos. 3 to 5:
294+50×(3-1)+1.0×(244+244+244+100)=1226≥1000
→ The values of N and SIZE are cleared.
• Second ITP process
- Calculation for station Nos. 5 to 6:
294+50×(2-1)+1.0×(244+244+100)=932≤1000
→ The ITP process count (n) is determined to be 2 and
calculation for all communication slave stations is
complete.
Thus, Z: One-scan time within the CNC is 8 msec for this example.