Delta MH300 Series - Page 909

Chapter 16 PLC Function ApplicationsMH300
16-46
Command
Function
RST
Clear contact or register
Operand
X0–X17
Y0–Y17
M0–M799
T0–159
C0–C79
D0–D399
－
   

Resets the designated element as described.
Element
Mode
Y, M
Both coil and contact are set to OFF.
T, C
Sets the current timing or count value to 0 and both the coil and contact
are set to OFF.
D
Sets the content value to 0.
If the RST command is
not executed, the status of the designated element remains
unchanged.
Ladder diagram:
X0
Y5
RST
Command code:
Description:
LD
X0
Load Contact A of X0
RST Y5
Clear the contact or
register
Command
Function
TMR
16-bit timer
Operand
T-K
T0–T159, K0–K32,767
T-D
T0–T159, D0–D399
Electrifies the designated timer coil, and the timer begins timing. The contact’s action
is as follows when the timing value reaches the designated setting
value (timing value
≥ setting value):
N.O. (Normally Open) contact
Closed
N.C. (Normally Closed) contact
Open
If the RST command is not
executed, the status of the designated element remains
unchanged.
Ladder diagram:
X0
T5
TMR
K1000
Command code:
Description:
LD
X0
Load Contact A of X0
TMR T5 K1000
T5 timer
Set value as K1000
Command
Function
CNT
16-bit counter
Operand
C-K
C0–C79, K0–K32,767
C-D
C0–C79, D0–D399
When you execute the CNT command from OFF to ON, switch the designated counter
coil from no power to electrified and add one to the counter’s count value. W
hen the
count reaches the designated value (count value = setting
value), the contact has the
following action:
N.O. (Normally Open) contact
Closed
N.C. (Normally Closed) contact
Open
After reaching the count value, the contact and count value both remain unchanged
even with
continued count pulse input. Use the RST command to restart or clear the
count.
Ladder diagram:
X0
C2
CNT K100
Command code: Description:
LD
X0
Load Contact A of X0
CNT C2 K100
C2 counter
Set value as K100