时系统（及更高版本） 描述 MaxNodesPerRead [...] UA 规范。 MaxNodesPerHistoryReadData 100 V3.5 SP 17 MaxNodesPerHistoryRead

port number to read [...] MCP23S17_FB.read8 (METH) ¶ METHOD read

ETC_ADS_IoLinkRead [...] _BLOCK ETC_ADS_IoLinkRead [...] _ADS_IoLink Function block to read

SysComRead (FUN) ¶ FUNCTION SysComRead [...] actual read bytes</p

ClientRequestRead [...] _BLOCK ClientRequestReadHoldingRegistersWide EXTENDS ClientRequestRead

ClientRequestRead [...] _BLOCK ClientRequestReadInputRegistersWide EXTENDS ClientRequestRead

ClientRequestRead [...] _BLOCK ClientRequestRead [...] FB.ClientRequest Read

timeout. SerialInvalidComPort [...] . SerialComPortUserInconsistentPort [...] settings. SerialComPort

FunctionCode 0 ReadCoils 1 ReadDiscreteInputs 2 Read

_PQI : STRUCT PROFINET Port [...] (PQI) The “Port [...] Port or the status