eWON General Reference Guide - Esco Drives & Automation

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General Reference GuideIO Servers Configuration5.8.4 Tag name conventionIO server NameTopic nameS5-AS511A or B or CItem Name ValueName, ComPortNum COM port is defined Tag by TagValueNameTopic COM port is used (or default)Table 87: S5-AS511 IO server Tag name convention tableComPortNum: The port number used to access the PLC; if not specified, the default COM port is used.• If a port address is specified in the topic, it is used and overloads per Tag address.• If no address is specified, neither in the topic, nor at the Tag level, then the default port is used (Default port is the ECIA Port -COM:1).5.8.4.1 ValueNameDBxLy Data block x Word offset y, left byte of word (0 - 255)DBxRy Data block x Word offset y, right byte of word (0 - 255)DBxWy Data block x Word offset y, full word (0 - 65535)DBxDy Data block x DWord offset y (-2147483648->2147483647) (*)Tx or Kx Timer x (0-65535)Cx or Zx Counter x (0-65535)MxB or FxBMxW or FxWMemento as ByteMemento as WordMxD or FxD Memento as DWord (*)Ix or ExQx or AxInputOutput(*) Important: See “Tags are stored as Float” on page 67Table 88: S5-AS511 IO server value names• Bit access modifier:In any of the above items, it is possible to access a single bit.#x must be appended to the Value Name (Bit index goes from 0..31).The syntax can be used for reading bits and for writing them as well.Example:DB1W13#3 represents bit 3 of W13 in DB 1Q32B#0 represents bit 0 of Q32.Note that you must define the type byte (B) to successfully extracts a bit (Q32#0 will not work).REM:Bit index range depends on item referenced (for W, bit index maximum value is 15)NOTES:• For DB the smallest element is a WORD and we count addresses in Word.This means that DB1W0 and DB1W1 WILL NOT overlap.• Timers and Counters are always Words and addresses are counted in WORD as well.This means that T0 and T1 WILL NOT overlap.• For M, I, Q addresses are counted in BYTES.This means that M0W and M1W WILL overlap.• Both syntax (German and English) can be used for I, Q, Cwhich in German gives: E, A, Z.RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 111
General Reference GuideIO Servers Configuration• Status register:The STATUS Tag is a special Tag that returns information about the current state of communication for a given device. As for other Tags, thestatus Tag ValueName is composed of:Status,ComPortNum• You can define a status Tag for each COM port used.• If you use the status address, the Tag must be configured as analog.0Communication not initialized. Status UNKNOWN.If no Tag is polled on that device address, the communication status is unknown.1 Communication OK.2 Communication NOT OK.Table 89: Tag status meaningRG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 112
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