Delta AH500 Programming Manual page 487

Example:
Suppose the first special module at the right side of the CPU module is AH50010SCM-A5. When
X1.1 is switched from OFF to ON, the instruction TO is executed. The mode of the data exchange
through COM1 on AH50010SCM-5A stored in CR#7 changes from being disabled to being enabled.
Owing to the fact that no error occurs, the code stored in D110 is 16#0000.
The use of the parameters:

The module is placed on the main rack. Therefore, the rack code stored in D40 is 16#0001.

The module is inserted in the first slot. Therefore, the slot code stored in D41 is 16#0000.

The mode of the data exchange through COM1 is stored in CR#7. Therefore, the control
register number stored in D42 is 16#0007.

Owing to the fact that the mode of the data exchange through COM1 occupies one register,
the value in D2 is 1.

The data which is written into CR#7 is stored in D100. Therefore, the value in D100 is
16#0002.
The regulation of the operands in the instruction:

The operand m specifies the rack code. It should be within the range between 1 and 8. 1
1
represents a main rack, and 2~8 represent extension racks.

The operand m specifies the slot code. It should be within the range between 0 and 11. If the
2
rack code is 1, the slot code should be within the range between 0 and 11. If the rack code is
within the range between 2 and 8, the slot code should be within the range between 0 and 7.

The operand m specifies the control register number. The 16-bit memories built in the special
3
modules are called the control registers. The control register numbers are decimal numbers
#0~#N, and the number of control registers varies with the module. The operating conditions of
the special module and the setting values are stored in the control registers.

At most 68 special modules can be placed on the rack, and they do not occupy inputs/outputs.

If the instruction FROM/TO is used, one control register is taken as a unit for the
reading/writing of the data. If the instruction DFROM/DTO is used, two control registers are
taken as a unit for the reading/writing of the data.
Ch a pt er 6 Ap p l i ed I ns t r uc t i ons
6-319