Chapter 6 Applied Instructions 6.15.2 Explanation of Module Instructions Symbol: m 1 ： Rack code Word/Double word m 2 ： Slot code Word/Double word m 3 ： Control register number Word/Double word D 1 ： Device in which the data is stored Word/Double word D 2 ： Device in which the error code is stored Word/Double word n ： Data length Word/Double word Explanation: 1. Users can use this instruction to read the data from the control register in the special module into the AH500500 series PLC. 2. The operand m 1 should be within the range between 1 and 8. 1 represents a main rack, and 2~8 represent extension racks. 3. The operand m 2 should be within the range between 0 and 11.
If the 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. 4. The operand m 3 specifies the control register number. 5. When the instruction FROM is executed, D 2 is set to 0. When an error occurs, D 2 is not set to 0. Please refer to the additional remark below for more information about the error codes. 6. The operand n used in the 16-bit instruction should be within the range between 1 and 256, and the operand n used in the 32-bit instruction should be within the range between 1 and 128. 7. Only the 32-bit instructions can use the 32-bit counter. 8.
Please refer to the regulation of the operands in the instruction TO for more information about the numbering of the special modules. 9. Special modules include analog I/O modules, network I/O modules, and position I/O modules. Example: Suppose the first special module at the right side of the CPU module is AH50010SCM-A5.
When 6-317 API Instruction code Operand Function 1400 D FROM P m ,m ,m ,D ,D ,n 1 2 3 1 2 Reading the data from the control register in the special module Device X Y M S T C HC D L SM SR E PR K 16# “$” DF m1 m2 m3 D 1 D 2 n Pulse instruction 16-bit instruction (13 steps) 32-bit instruction (13 steps) AH500 AH500 AH500