Mitsubishi Electric NZ2GFCF-D62PD2 User Manual page 110

No.
For counting down from the lower limit value (-2147483648) in CH Present value (RWr10 to RWr11, RWr28 to RWr29), the
underflow error occurs and CH Underflow detection flag (RWr20.b1, RWr38.b1) is changed to Detected (1) from Not detected
1) (0).
For details on the underflow error, refer to the following.
Page 108, Section 8.4.1 (2)
When CH Preset/replace command (RY21, RY39) is turned off then on to clear the underflow error, the value in CH Preset
value setting (RWw14 to RWw15, RWw2C to RWw2D) is stored in CH Present value (RWr10 to RWr11, RWr28 to RWr29) and
2)
CH Underflow detection flag (RWr20.b1, RWr38.b1) is changed to Not detected (0) from Detected (1).
Counting in CH Present value (RWr10 to RWr11, RWr28 to RWr29) resumes.
For counting up from the upper limit value (2147483647) in CH Present value (RWr10 to RWr11, RWr28 to RWr29), the overflow
error occurs and CH Overflow detection flag (RWr20.b2, RWr38.b2) is changed to Detected (1) from Not detected (0).
3)
For details on the overflow error, refer to the following.
Page 108, Section 8.4.1 (2)
When CH Preset/replace command (RY21, RY39) is turned off then on to clear the overflow error, the value in CH Preset
value setting (RWw14 to RWw15, RWw2C to RWw2D) is stored in CH Present value (RWr10 to RWr11, RWr28 to RWr29) and
4)
CH Overflow detection flag (RWr20.b2, RWr38.b2) is changed to Not detected (0) from Detected (1).
Counting in CH Present value (RWr10 to RWr11, RWr28 to RWr29) resumes.
For T
*1 , refer to Page 305, Appendix 4.
1
(2) Overflow error and underflow error
• When "0: Linear Counter" is selected for "CH Counter format", the underflow error occurs at counting down
from -2147483648 (lower limit value) in CH Present value (RWr10 to RWr11, RWr28 to RWr29) and the
overflow error occurs at counting up from 2147483647 (upper limit value).
• If the overflow error occurs, CH Overflow detection flag (RWr20.b2, RWr38.b2) is set to Detected (1) and
CH Overflow/underflow error (error code: 200
Then, the counting stops. The value in CH Present value (RWr10 to RWr11, RWr28 to RWr29) does not
change from 2147483647 even when pulses are input.
• If the underflow error occurs, CH Underflow detection flag (RWr20.b1, RWr38.b1) is set to Detected (1)
and CH Overflow/underflow error (error code: 200
RWr3A). Then, the counting stops. The value in CH Present value (RWr10 to RWr11, RWr28 to RWr29)
does not change from -2147483648 even when pulses are input.
• An overflow and underflow error is cleared by the preset/replace function. After CH Overflow detection flag
(RWr20.b2, RWr38.b2) and CH Underflow detection flag (RWr20.b1, RWr38.b1) are set to Not detected
(0), the counting resumes. Though, CH Latest error code (RWr22, RWr3A) is held until it is reset. Reset
CH Latest error code (RWr22, RWr3A) by CH Error reset command (RY36, RY4E).
108
Description
) is stored in CH Latest error code (RWr22, RWr3A).
H
) is stored in CH Latest error code (RWr22,
H