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5.12.3.1 Value Name The syntax is the following: General Reference Guide IO Servers Configuration Important: All the addresses are always in BYTES (except for Counter and Timer that are objects) Note: The Modifier can by omitted, the modifier in bold will be used (DB type must have a modifier). (*) Important: To avoid loss of precision due to Integer to float conversion, choose the right storage DataType for your Tag. See "DataType of Tags" on page 75 Examples • Bit access modifier: Symbol Memory Type Modifier Address DBx Data Block number x B, C, W, S, D, L, F Byte offset M Internal Memory B, C, W, S, D, L, F Byte offset C Counter W, S Object number T Timer W, S Object number I Discrete Inputs B, C, W, S, D, L, F Byte offset Q Discrete Outputs B, C, W, S, D, L, F Byte offset PI Peripheral Inputs B, C, W, S, D, L, F Byte offset PQ Peripheral Outputs B, C, W, S, D, L, F Byte offset Table 112: S7 300-400 Memory types Symbol Modifier value range Automatic Tag type B Byte 0 .. 255 DWord C signed Byte -128 .. 127 Integer W Word 0 .. 65535 DWord S signed Word -32768 .. 32767 Integer D DWord 0 .. 4294967296 (*) DWord L signed DWord -2147483648 .. 2147483647 (*) Integer F Float +/- 3.4e38 Float Table 113: S7 300-400 Modifiers address point to MW4 the Word at address 4 (in bytes) in the Internal Memory CS1 the Counter number 1, read it as Signed Word DB2L5 the DWord at address 5 (in bytes) in the Data Block 2 IB3 the Byte at address 3 (in bytes) in the Discrete Inputs zone I5#2 the bit 2 from the Byte (read ’Bit access modifer’ note below) at address 5 in the Discrete Inputs zone Table 114: S7 300-400 register address examples In any Memory Type (excluding Counter and Timer), it is possible to access a single bit. A #x must be appended to the Value name. As the address is always in byte, the Bit index goes only from 0 to 7, no Modifer are allowed (except B to separate DB block from the address). The syntax can be used for reading bits and for writing them as well. If Tag type “Automatic” is used, the type Boolean will be choosed. Example: RG-001-0-EN ver 1.14 eWON® - 02/05/2012 - ©eWON sa Page 139
DB1B13#3 represents bit 3 of Byte 13 in DB 1 invalid: IW5#2 wrong because there is a Modifier I5#10 wrong because bit number greater than 7 • Status register: General Reference Guide IO Servers Configuration The STATUS Tag is a special Tag that returns information about the current state of the communication for a given device. As for other Tags, the status Tag ValueName is composed of: Status, Global Device Address • You can define a status Tag for each PLC used. • If you use the status address, the Tag must be configured as analog. 0 Communication 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 115: Tag Status meaning 5.12.3.2 Global Device Address The device address is either appended to the ValueName in the Item Name definition or entered in the Topic global address fields. The device address is composed like following: MPI, MPI node address PROFIBUS, Profibus node addr MPI, Subnet ID, node address MPI node address: MPI node address of the PLC Reach by MPI the PLC with the node address 2 node address: PROFIBUS node address of the PLC Reach by Profibus the PLC with the node address 9 When the Advanced Routing Setup is Enabled(“Advanced Routing Setup” on page 137), the following syntax can be applied to reach a device on the MPI network indirectly connected to the eWON (behind one or several other PLCs) Subnet ID: ID of the destination S7-Subnet ID node address: MPI/Profibus node address of the PLC to reach Reach by MPI/Profibus the PLC with the node address 4 on the subnet with subnet ID 4859-4565 Table 116: MPI/ISOTCP device address syntax RG-001-0-EN ver 1.14 eWON® - 02/05/2012 - ©eWON sa Page 140
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eWON Family 500, 2001, 2001CD, 4001
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Table of content 5.4.3 Tag name con
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Table of content 8.3.3 $dtRL [Real
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2 The eWON login page 2.1 Access fr
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3.2 Users Setup The Users Setup pag
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3.2.5 User’s directory restrictio
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3.3 System Setup General Reference
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3.3.1.2 Alarms (globals parameters)
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3.3.1.5 Task Planner Since Firmware
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3.3.1.5.2 Edit Action page When you
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General Reference Guide eWON Config
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When using modem port for VCOM, the
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3.3.2.7 SNMP Setup 3.3.2.7.1 Commun
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3.3.3 Diagnosis 3.3.3.1 Overview Ge
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3.3.3.4 Debug Control Description L
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Each mechanisms provides you all or
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Select next server in case of error
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3.3.4.2.3 ADSL General Reference Gu
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VPN between two eWONs General Refer
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VPN with an ENDIAN Server You can f
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Ethernet WAN Connection - Disconnec
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3.3.4.3 Networking Config 3.3.4.3.1
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3.3.4.5 STORAGE General Reference G
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3.4.1.2 Tags validation General Ref
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3.4.2.1 Tag main edit window Genera
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Control Description Tag name Tag De
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Examples: General Reference Guide e
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8.3.3 $dtRL [Real time Logging] Gen
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8.3.12 $dtPP General Reference Guid
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10.9 GSM modem Led behavior Figure
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