Kinco MK043E-20DT - Page 51

Kinco-MK
User Manual
51
 How to modify current value
Each high speed output channel has one register for current value, they are
SMD212,SMD242,SMD262and SMD226.The outputted pulse number are stored in these
registers. Current value registers are read only, if user needs to modify the current value, it can
use following methods.
 Method 1
User reset bit to clear current value.
The reset bits for 4 output channels are SM201.6, SM231.6, SM251.6 and SM221.6.
When the reset bit is 1, PLC will set the current value as 0.Therefore, t only needs one scan
time for the reset bit to activate. When it needs to use this bit, try to avoid to keep this bit
always 1 and also and also avoid to set this bit while the Position Control instruction (Include
PHOME, PREL, PABS, JOG and PFLO_F) is executing, otherwise the counting value may be
wrong.
Following takes channel 0 as example to describe how to reset current value.
(* Network 0 *)
(*Based on homing signal, when it moves to homing, it requires to clear current value*)
LD %SM0.0
PHOME 0, %M0.0, %M0.1, %M0.2, %VW0, %VW2, %VW4, %VD6, %VW10, %M0.4, %M0.5, %MB1
(* Network 1 *)
(*After PHOME finishing, it uses finishing bit “DONE” to clear current value*)
LD %M0.4
R_TRIG
ST %SM201.6
 Method 2
Modify current value by using following registers.
Q0.0
Q0.1
Q0.4
Q0.5
Description
SMD208
SMD238
SDM258
SMD222
Read/Write. New current value. Use to modify the
current value together with specific control bit.
SM201.4
SM231.4
SM251.4
SM221.4
Read/Write. Use to modify current value.
1 - Modify current value.
0 - Maintain the current value.
Here takes channel 0 as example to describe the method: If SM201.4 is 0,then it will maintain
the current value SMD212. If SM201.4 is 1, then it will move the value of SMD208 to
SMD212.When it needs to use this bit, avoid to keep this bit always 1 and also avoid to set this
bit while the Position Control instruction (Include PHOME, PREL, PABS, JOG and PFLO_F)