Commit 535e696f23d7c0800f9bd4880879b34dfdf205ff
1 parent
51500e93
New definitions for MAX_STATUS and MAX_REGISTERS
Improve the conformance to the Modbus protocol. MAX_STATUS: 800 -> 2000 MAX_REGISTERS: 100 -> 125
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9 additions
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2 deletions
src/modbus.h
| @@ -55,8 +55,15 @@ extern "C" { | @@ -55,8 +55,15 @@ extern "C" { | ||
| 55 | */ | 55 | */ |
| 56 | #define MAX_MESSAGE_LENGTH 256 | 56 | #define MAX_MESSAGE_LENGTH 256 |
| 57 | 57 | ||
| 58 | -#define MAX_STATUS 800 | ||
| 59 | -#define MAX_REGISTERS 100 | 58 | +/* Modbus_Application_Protocol_V1_1b.pdf (chapter 6 section 1 page 12) |
| 59 | + * Quantity of Coils (2 bytes): 1 to 2000 (0x7D0) | ||
| 60 | + */ | ||
| 61 | +#define MAX_STATUS 2000 | ||
| 62 | + | ||
| 63 | +/* Modbus_Application_Protocol_V1_1b.pdf (chapter 6 section 3 page 15) | ||
| 64 | + * Quantity of Registers (2 bytes): 1 to 125 (0x7D) | ||
| 65 | + */ | ||
| 66 | +#define MAX_REGISTERS 125 | ||
| 60 | 67 | ||
| 61 | #define REPORT_SLAVE_ID_LENGTH 75 | 68 | #define REPORT_SLAVE_ID_LENGTH 75 |
| 62 | 69 |