BASEstartm Classic DAS
for Allen-Bradley
Data Highwaytm Protocol
Installation and User's Guide


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Integer File Addresses

Table 3-15 describes address specifications and data types for integer file addresses. Integer file addresses are identical for all PLC-5 devices, except that a module number must be specified for the PLC-5/250.

Table 3-15 Integer File Addresses
Address Format Comment
mNf:nn Word Integer file word
mNf:nn/bb Bit Integer file bit

Floating Point File Addresses

Table 3-16 describes address specifications and data types for floating point file addresses. Floating point file addresses are identical for all PLC-5 devices, except that a module number must be specified for the PLC-5/250.

Table 3-16 Floating Point File Addresses
Address Format Comment
mFf:nn Float Float file floating point

ASCII File Addresses

Table 3-17 describes address specifications and data types for ASCII file addresses. ASCII file addresses are supported only for the PLC-5/10, PLC-5/11, PLC-5/12, PLC-5/15, PLC-5/20, PLC-5/25, PLC-5/30, PLC-5/40, PLC-5/60 and the PLC-5/80. ASCII addresses must be read from and written to with element counts that are multiples of 2.

Table 3-17 ASCII File Addresses
Address Format Comment
Af:nn Array[2]:byte 2 ASCII file characters

Long Integer File Addresses

Table 3-18 describes address specifications and data types for long integer file addresses. Long integer file addresses are supported only for the PLC-5/250.

Table 3-18 Long Integer File Addresses
Address Format Comment
mLf:nn Word Long integer file longword
mNf:nn/bb Bit Long integer file bit

PID Control File Addresses

Table 3-19 describes address specifications and data types for PID control file addresses. PID control file addresses are supported only for the PLC-5/250.

Table 3-19 PID Control File Addresses
Address Format Comment
mPDf:nn Array[164]:byte Entire PID control structure
mPDf:nn/bb Bit PID control structure bit
mPDf:nn.SP Float Setpoint
mPDf:nn.KP Float Proportional gain
mPDf:nn.KI Float Integral gain
mPDf:nn.KD Float Derivative time
mPDf:nn.BIAS Float Output bias %
mPDf:nn.MAXS Float Setpoint maximum
mPDf:nn.MINS Float Setpoint minimum
mPDf:nn.DB Float Deadband
mPDf:nn.SO Float Set output %
mPDf:nn.MAXO Float Output limit high %
mPDf:nn.MINO Float Output limit low %
mPDf:nn.UPD Float Update time
mPDf:nn.PV Float Process variable
mPDf:nn.ERR Float Error
mPDf:nn.OUT Float Output
mPDf:nn.PVH Float PV alarm high
mPDf:nn.PVL Float PV alarm low
mPDf:nn.DVP Float Deviation alarm +
mPDf:nn.DVN Float Deviation alarm -
mPDf:nn.PVDB Float PV alarm deadband
mPDf:nn.MAXI Float Input range maximum
mPDf:nn.MINI Float Input range minimum
mPDf:nn.TIE Float Tieback %
mPDf:nn.ADDR Float Address of master loop
mPDf:nn.DVDB Float Deviation alarm deadband
mPDf:nn.DATA Array[14]:float Reserved - interim use
mPDf:nn.EN 1 Bit PID enable bit
mPDf:nn.CT 1 Bit Cascaded type bit
mPDf:nn.CL 1 Bit Cascaded loop bit
mPDf:nn.PVT 1 Bit PV tracking bit
mPDf:nn.DO 1 Bit Derivative off bit
mPDf:nn.SWM 1 Bit Software A/M mode bit
mPDf:nn.CA 1 Bit Control action bit
mPDf:nn.MO 1 Bit Mode bit
mPDf:nn.PE 1 Bit PID equation bit
mPDf:nn.INI 1 Bit PID initialized bit
mPDf:nn.SPOR 1 Bit SP out of range bit
mPDf:nn.OLL 1 Bit Output limit low bit
mPDf:nn.OLH 1 Bit Output limit high bit
mPDf:nn.EWD 1 Bit Error within deadband bit
mPDf:nn.DVNA 1 Bit Deviation high alarm bit
mPDf:nn.DVPA 1 Bit Deviation low alarm bit
mPDf:nn.PVLA 1 Bit PV low alarm bit
mPDf:nn.PVHA 1 Bit PV high alarm bit


1 Control bits should be treated as read only and modified only under PLC program control. Modifying these bits from a computer can give unpredictable results.


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