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All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation
TI 04L01A01-02E
4.1.8
Setting Restrictions and Supplement Information
Stacks
Stacks are the items defined in a calculation expression, such as the measured values specified by
channel number and constants. In a DX Series, up to 16 stacks can be set in each calculation. Setting
more than 16 stacks results in a calculation error and the result to be set as “+****” (positive overflow).
Example: 01
+
01*(01+01*(01+01*(01+01*(01+01*(01+01*(01+01*(01+01*01)))))))
This example uses 17 stacks, and hence results in a calculation error.
Calculation Errors
The following calculations result in a calculation error and cause the calculation result to be output as
“+****” (positive overflow).
・
X/0
・√
-X
・
LOG(-X)
・
When a calculation expression contains a channel number which is set as being skipped.