Mitsubishi NZ2GFCF-D62PD2 User Manual page 98

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 (0).
1)
For details on the underflow error, refer to the following.
Page 96, Section 8.2.1 (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 96, Section 8.2.1 (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 CH
4)
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.
Δ
*1 For T , refer to Page 283, 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).
96
Description
) is stored in CH Latest error code (RWr22, RWr3A).
H
) is stored in CH Latest error code (RWr22,
H