equal
deleted
inserted
replaced
145 iotype_t req_type; |
145 iotype_t req_type; |
146 u8 mb_function; |
146 u8 mb_function; |
147 u16 address; |
147 u16 address; |
148 u16 count; |
148 u16 count; |
149 int retries; |
149 int retries; |
150 u8 error_code; // modbus error code (if any) of current request |
150 u8 mb_error_code; // modbus error code (if any) of last executed request |
|
151 u8 tn_error_code; // transaction error code (if any) of last executed request |
151 int prev_error; // error code of the last printed error message (0 when no error) |
152 int prev_error; // error code of the last printed error message (0 when no error) |
152 struct timespec resp_timeout; |
153 struct timespec resp_timeout; |
153 u8 write_on_change; // boolean flag. If true => execute MB request when data to send changes |
154 u8 write_on_change; // boolean flag. If true => execute MB request when data to send changes |
154 // buffer used to store located PLC variables |
155 // buffer used to store located PLC variables |
155 u16 plcv_buffer[REQ_BUF_SIZE]; |
156 u16 plcv_buffer[REQ_BUF_SIZE]; |
174 * (u16 because the flag is a word! ) |
175 * (u16 because the flag is a word! ) |
175 * -> MSByte will store the result of the last executed MB transaction |
176 * -> MSByte will store the result of the last executed MB transaction |
176 * 1 -> error accessing IP network, or serial interface |
177 * 1 -> error accessing IP network, or serial interface |
177 * 2 -> reply received from server was an invalid frame |
178 * 2 -> reply received from server was an invalid frame |
178 * 3 -> server did not reply before timeout expired |
179 * 3 -> server did not reply before timeout expired |
179 * 4 -> server returned a valid error frame |
180 * 4 -> server returned a valid Modbus error frame |
180 * -> if the MSByte is 4, the LSByte will store the MB error code returned by the server |
181 * -> if the MSByte is 4, the LSByte will store the MB error code returned by the server |
181 * -> will be reset (set to 0) once this MB transaction has completed sucesfully |
182 * -> will be reset (set to 0) once this MB transaction has completed sucesfully |
|
183 * |
|
184 * In other words, this variable will be set from the current status of the |
|
185 * mb_error_code and tn_error_code flags after each request. |
182 */ |
186 */ |
183 u16 flag_exec_status; |
187 u16 flag_exec_status; |
184 } client_request_t; |
188 } client_request_t; |
185 |
189 |
186 |
190 |