VTScada supports native device address formats. For example, in a PLC5 "T4:1.ACC".
Bit-wise addressing for binary and integer formats is written by following the element with "/bit-number", except for timers which use a dot notation.
VTScada performs limited range checking on addresses and does not attempt correlate to the explicit ranges of all PLC models (i.e. some PLC’s may have limits which are more restrictive). Refer to the following list for structure member mnemonics that are supported by VTScada.
Some other structure members can be referenced via their bit number directly (for example /bb). Refer to the Allan Bradley documentation for the full structure definition.
PLC-3, PLC-5, SLC-500 and MicroLogix 1100-1500 have similar address format. PLC-2’s linear addressing scheme is listed separately. PLC-5/250 is not documented.
Input / Output Tables file - Logical address
I:xxx.wrd/bb for inputs
O:xxx.wrd/bb for outputs
xxx is the element number as follows:
The octal word number for PLC-3 (0 – 377) and PLC-5 (0 – 1999)
The decimal slot number for SLC (1 – 30) and MicroLogix (1 – 4)
.wrd is the optional word number, for SLC and MicroLogix only. Range is 0 – 255, defaults to 0 if not included
/bb is the optional bit number
Status Files - Logical address
S:xxx/bb
xxx is the word number (decimal). Range of 0 – 9999 on the PLC-3.
/bb is the optional bit number
Binary Files - Logical address
Bn:xxx/bb
n is the file number. Range 3 or (user-defined) 9 to 9999 for non-PLC-3 and 0 to 9999 on PLC-3.
xxx element number Range 0 to 1999 in the PLC-5
/bb is the optional bit number
Timer Files - Logical address
Tn:xxx.neu
n is the file number. Range 4 or (user-defined) 9 to 9999 for non-PLC-3 and 0 to 9999 on PLC-3.
xxx element number Range 0 to 1999 in the PLC-5
neu is a structure mnemonic as follows:
PRE, ACC (PLC-5 and MicroLogix)
PRE, ACC, EN, TT, DN (SLC-500)
Counter Files - Logical address
Cn:xxx.neu
n is the file number. Range 5 or (user-defined) 9 to 9999 for non-PLC-3 and 0 to 9999 on PLC-3.
xxx element number. Range 0 to 1999 in the PLC-5
neu is a structure mnemonic as follows:
PRE, ACC (PLC-5 and MicorLogix)
PRE, ACC, CU, CD, DN, OV, UN, UA (SLC-500)
Control Files - Logical address
Rn:xxx.neu
n is the file number. Range 6 or (user-defined) 9 to 9999 for non-PLC-3 and 0 to 9999 on PLC-3.
xxx element number. Range 0 to 1999 in the PLC-5
neu is a structure mnemonic.
PRE, ACC (PLC-5 and MicroLogix)
LEN, POS, EN, EU, DN, EM, ER, UL, IN, FD (SLC-500)
Integer Files - Logical address
Nn:xxx/bb
n is the file number. Range 7 or (user-defined) 9 to 9999 for non-PLC-3 and 0 to 9999 on PLC-3.
xxx element number. Range 0 to 1999 in the PLC-5
/bb is the optional bit number
Float Files - Logical address
Fn:xxx
n is the file number. Range 8 or (user-defined) 9 to 9999 for non-PLC-3 and 0 to 9999 on PLC-3.
xxx element number. Range 0 to 1999 in the PLC-5
ASCII Files - Logical address
An:xxx
n is the file number.
xxx element number. Range 0 to 1999 in the PLC-5 and 0 – 9999 in the PLC-3
String Files - Logical address
STn:xxx or Sn:xxx in the PLC-3
n is the file number.
xxx element number. Range 0 to 1999 in the PLC-5 and 0 – 9999 in the PLC-3
PID Files (PLC-5 only) - Logical address
PDn:xxx.neu/bb
n is the file number.
xxx element number Range 0 to 1999
neu is a structure mnemonic (see following table)
Bit Words: CTRL, STS (need a /bb to access specific bits)
Floats (structure mnemonics)
SP Set Point KP Proportional Gain KI Initial Gain KD Derivative Gain BIAS Output Bias % MAXS Maximum Scaled Value MINS Minimum Scaled Value DB Dead Band SO Set Output % MAXO Maximum Output Limit MINO Minimum Output Limit UPD Update Time PV Process Variable ERR Error: Scaled OUT Output PVH PV Alarm High PVL PV Alarm Low DVP Deviation Alarm + DVN Deviation Alarm – PVDB PV Alarm Dead Band DVDB Deviation Alarm Dead Band MAXI Maximum Input MINI Minimum Input TIE Tieback % Long: ADDR Master-to-Slave Address
BCD Files (PLC-3 only) - Logical address
Dn:xxx
n is the file number
xxx element number. Range limit 0 to 9999
Data Logger Historical Reads
DLX:Y
X is the queue number
Y is the element number.
The queue number can range between 0 and 255. The element number can range between 1 and 11.
PLC 2 Linear Addressing
xxx/bb
xxx is an octal number
/bb is an optional bit octal number
PLC-5/250 - call for support
Mnemonics that are not supported:
- .EN for a Timer Mnemonics.
You may be able to access this directly using /15. - .DN syntax a Timer Mnemonics.
You may be able to access these bits directly using /13. - .SWM syntax for a PID Mnemonic.
You may be able to access this bit directly by using /4.
