Table 2 : Example Status Word (ASD Register 0xFE01) Format
| Bit | Function | 0 | | 1 |
| 15 | Reserved | | -- |
| 14 | Faulted status | Not faulted | | Faulted |
Byte | 13 | Reserved | | -- |
12 | Reserved | | -- |
High | 11 | Reserved | | -- |
| |
| 10 | Run / stop status | Stopped | | Running |
| 9 | Forward / reverse status | Forward | | Reverse |
| 8 | Jog status | Not jogging | | Jogging |
| 7 | DC injection braking status | Not DC injection | | DC injection |
| | | braking | | braking |
Byte | 6 | Accel / decel #1/#2 status | #1 | | #2 |
5 | Reserved | | -- |
4 | Reserved | | -- |
Low | |
3 | Reserved | | -- |
| 2 | Reserved | | -- |
| 1 | Reserved | | -- |
| 0 | Reserved | | -- |
10.4 Register Remap Function
Some Modbus client software does not allow access to more than 10,000 Modbus holding registers. As the standard ETH-100 mapping provides a simple 1-to-1 correspondence between Modbus holding registers and ASD registers (ASD register number + 1 = Modbus holding register number), this can cause certain critical ASD registers to be inaccessible from these clients. Specifically, Toshiba drives typically place communication control registers and status registers in the 0xFAxx to 0xFFxx ASD register region. For example, “Communication Frequency Command” is typically assigned to ASD register number 0xFA01, which is accessible via Modbus holding register 0xFA01 + 1 = 0xFA02, which is 64002 in decimal. As this Modbus holding register number is higher than 10,000, this register would not be accessible via register-limited clients unless the ETH-100 performed register remapping.
“Remap OFF” (default setting) does not modify the register mapping between the ASD registers and the Modbus holding registers: a simple 1-to-1 correspondence exists. “Remap ON” modifies the ASD register mapping slightly to allow access to the drive’s critical control and status registers by Modbus clients that are limited to accessing 10,000 holding registers max.
With the Remap parameter set to “ON”, the ETH-100 will add 0xF000 (6144010) to incoming ASD register accesses between 0x0A00 and 0x0FFF (Modbus holding registers 0x0A01 – 0x1000). In this way, register-limited clients need only write to Modbus holding register 0x0A02 (256210) to set the Communication Frequency Command. Similarly, “Current Output Frequency” is typically located at ASD register
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