(modbus): Исправил ошибку в функции autodetect-slave (eterbug #9220)

Utilities/MBTester/mbrtutester.cc

@@ -58,7 +58,7 @@ static void print_help()
 	printf("          fn - function of test [0x01,0x02,0x03,0x04]. Default: 0x04\n");
 	printf("[--autodetect-slave] [beg end reg fn]  - find slave\n");
 	printf("          beg - start addres Default: 0\n");
-	printf("          end - end addres Default: 255\n");
+	printf("          end - end addres Default: 254\n");
 	printf("          reg - register of test. Default: 0\n");
 	printf("          fn - function of test [0x01,0x02,0x03,0x04]. Default: 0x04\n");
 	printf("[-y|--use485F]                    - use RS485 Fastwel.\n");
@@ -109,7 +109,7 @@ int main( int argc, char **argv )
 	ModbusRTU::ModbusAddr slaveaddr = 0x00;
 	ModbusRTU::SlaveFunctionCode fn = ModbusRTU::fnReadInputRegisters;
 	ModbusRTU::ModbusAddr beg = 0;
-	ModbusRTU::ModbusAddr end = 255;
+	ModbusRTU::ModbusAddr end = 254;
 	ModbusRTU::DiagnosticsSubFunction subfunc = ModbusRTU::subEcho;
 	ModbusRTU::ModbusData dat = 0;
 	int tout = 2000;

Utilities/MBTester/mbtcptester.cc

@@ -43,7 +43,7 @@ static void print_help()
 	printf("[--read03] slaveaddr reg count   - read from reg (from slaveaddr). Default: count=1\n");
 	printf("[--read04] slaveaddr reg count   - read from reg (from slaveaddr). Default: count=1\n");
 	printf("[--diag08] slaveaddr subfunc [dat]  - diagnostics request\n");
-	printf("[--read4314] slaveaddr devID objID - (0x2B/0x0E): read device identification (devID=[1...4], objID=[0..255])\n");
+	printf("[--read4314] slaveaddr devID objID - (0x2B/0x0E): read device identification (devID=[1...4], objID=[0..254])\n");
 //	printf("[--read43-13] slaveaddr ...     - (0x2B/0x0D):  CANopen General Reference Request and Response PDU \n");
 	printf("[-i|--iaddr] ip                 - Modbus server ip. Default: 127.0.0.1\n");
 	printf("[-a|--myaddr] addr              - Modbus address for master. Default: 0x01.\n");