Delta DVP-15MC Series, Руководство по эксплуатации

Страница: 350 / 972

Chapter 8 Logic Instructions
8-263
8_
3. For the register address of the slave, you can directly fill the MODBUS address and variable.
4. For the offset in the word operation, the actual address is calculated by word. For the offset in the bit
operation, the actual address is calculated by bit.
For example:
a) Actual address calculated via word offset :
When the address is %MW0 and the offset is 15, the actual operation address is
%MW15=%MW (0+15).
b) Actual address calculated via bit offset:
When the address is %QW0 and the offset is 7, the actual operation address is %QX0.7.
5. If you choose to read and write the word register of the slave, the %MW register of the local device
can be regarded as the storage register for reading and writing data. The range of the storage register
is %MW0~%MW32767. If the range is exceeded or other register is used, an error will occur in the
instruction.
6. If you choose to read and write the bit register of the slave, the %MW and %QW registers of the local
device can be regarded as the storage registers for reading and writing data. The ranges of the
storage register are %MW0~%MW32767 and %QW0~%QW63. If the ranges are exceeded or other
register is used, an error will occur in the instruction.
7. The set parameter values of this instruction are only valid during the operation of the PLC. When the
motion controller is repowered after the power off, the parameters configured before the power off
are all invalidated. The ETH_Link_Config instruction must be re-executed if the configuration before
the power off is needed to use.
8. When the bit registers of the slave are read, the value of Read_FunCode must be set to 01 or 02.
You can select the function code according to the type of the bit register through referring to the
corresponding module manual.
9. Set the communication mode via the input parameter Noncyclic . The communication mode is the
cyclic communication mode if Noncyclic is set to FALSE. The communication mode is the non-cyclic
communication mode if Noncyclic is set to TRUE.
a.
Cyclic Communication Mode: When the current Link is set as cyclic communication mode. The
configuration for the Link will be effective immediately and the data exchange between the
master and slave will be conducted cyclically after RS232 communication function is enabled
via RS232_Link_Manage instruction.
The configuration for the link will not be executed and the data exchange with the slave will stop
after RS232 communication function is disabled via RS232_Link_Manage instruction.
b.
Non-Cyclic Communication Mode: When the current Link is set as non-cyclic communication
mode. The configuration for the Link will be effective immediately and the data exchange
between the master and slave will be conducted only once after RS232 communication function
is enabled via RS232_Link_Manage instruction.
If the data exchange between the master and the slave is to be made once again, re-enable
RS232 communication function after RS232 communication function is disabled via
RS232_Link_Manage instruction.