Holding | Write Data | Meaning | |
Register | |||
|
| ||
| 0x5A5A | Reset the | |
|
| Reset the | |
0x6111 | 0xFEBA | configuration registers to factory default | |
| values. | ||
|
| ||
| Any other value | Return “ILLEGAL DATA VALUE” | |
| exception | ||
|
|
NOTE 1: Throughout this document, hexadecimal (base 16) numbers will be represented by a preceding “0x” or by a trailing “H” designator, decimal (base 10) numbers will be represented by a trailing subscripted “10” designator, and binary (base 2) numbers will be represented by a trailing “B” designator. Binary numbers will always be written with their most significant bit (MSB) at the left, and their least significant bit (LSB) to the right (next to the “B”).
For example, 0x6111 = 6111H = 2484910 = 0110 0001 0001 0001B.
NOTE 2: The Modbus specification lists two addresses for each holding register (4X reference) and coil (0X reference). These are referred to as the “addressed as” and “known” as values. In all instances, registers and coils are addressed starting at zero; i.e. register 1 is addressed as 0, and coil 15 is addressed as 14, etc. Throughout this document, all addresses given for coils and holding registers will be their “addressed as” values unless otherwise specified. In other words, add 1 to the register/coil address given to obtain its “known as” value. For example, the S7 drive’s inverter number parameter is 0802H (= 0x0802 = 205010.) Therefore, this register would be “known as” 2051. Refer to the Modbus Protocol Reference Guide for a more detailed explanation of this issue.
The station address set via switch SW2 must be set using binary encoding. In this case, SW2 #1 represents bit #0 of the address, and SW2 #8 represents bit #7. When one of the DIP switches of SW2 is turned ON, the corresponding address bit is 1, and when one of the switches is turned OFF, the corresponding address bit is 0.
For example, if an address of 16910 is desired, the conversion calculation would be performed as follows:
16910 = 0xA9 = 1010 1001B, therefore switches SW2 #1, #4, #6 and #8 should be ON, and #2, #3, #5 and #7 should be OFF.
Some more address configuration examples (factory default setting = 1):
Address | Address | Address | “ON” | “OFF” |
(Decimal) | (Hex) | (Binary) | Switches | Switches |
1 (min) | 0x01 | 0000 0001B | #1 | #2 ∼ #8 |
63 | 0x3F | 0011 1111B | #1 ∼ #6 | #7, #8 |
200 | 0xC8 | 1100 1000B | #4, #7, #8 | #1 ∼ #3, #5, #6 |
247 (max) | 0xF7 | 1111 0111B | #1 ∼ #3, #5 ∼ #8 | #4 |
|
| 14 |
|
|