COTRUST CTH200 Series - Page 305

CTH200 Series PLC User Manual
295
Note
 The number of motion control module is only internally unified. If the PLC has 3
modules, among which module 0 and 2 is the motion control module, module 1 is not,
then module 0 is ID0, module 1 is uncontrollable for it is not motion control module,
and module 2 is ID1.
 If a single motion control module is attached behind the CPU, the delay from enable
to execution of the output instruction is about 780us due to transmission delay. If
there are up to 5 motion control modules hanging behind the CPU, the delay is about
930us.
Read modules input status instruction
① Function name: MC253_READ_DI
② Function: Read input of motion control module
③ Parameter
Name
I/O
Description
Type
Value
range
Note
ID
IN
Motion control
module ID number
Byte
0~255
Apply only to motion
control module
DI
OUT
Module output port
value
Byte
0~255
DI corresponds to 8 I
input, low byte
corresponds to I low
bit, such as DI bit0
corresponds to I0.0
STATUS
OUT
Communication
status sign
1—communication
timeout
Bool
0~1
Note
 The number of motion control module is only internally unified. If the PLC has 3
modules, among which module 0 and 2 is the motion control module, module 1 is not,
then module 0 is ID0, module 1 is uncontrollable for it is not motion control module,
and module 2 is ID1.
 When an axis call motion control instruction, if confirm to operating conditions, the
running process of the axis port output pulse or direction according to the instruction
(corresponding port is not controlled by the MC253_DO_CTRL), the port can restore
normal IO functions after run (accept instruction MC253_DO_CTRL control); use
instruction MC253_DO_CTRL carefully so as not to affect the use of motion control.