Parker Hannifin GEM6K manual NTMPRB Network Map Binary Variables for Reading from PLC

NTMPRB Network Map Binary Variables for Reading from PLC

Type:	Network	Product	Rev
Syntax:	<!><n>NTMPRB<i>,<i>,<i>,<i>	6K	5.3
Units:	n = network server #
	1st i = Allen Bradley data file #
	2nd i = # of the 1st element in data file (beginning of range)
	3rd i = # of the elements to include in range
	4th i = # of the 1st binary (VARB) variable in the 6K to map to
Range:	n = 1-6
	1st i = 0-n (n depends on size of file)
	2nd i = 0-n (n depends on size of file)
	3rd i = 0 or 1-50 (0 disables polling for this mapping only)
	4th i = 1-125
Default:	1NTMPRB0,0,0,0 (no mapping)
Response:	1NTMPRB: *1NTMPRB1,5,15,23
See Also:	NTCONN, NTIP, NTMPWB, NTMPWI, NTMPRI, NTPOLL, [ NTS ], TNTS,
	TNTSF, VARB

<n> NTMPRB <i>,<i>,<i>,<i>

Network Server #

Range: 1-6

#of Allen-Bradley data file

#of first element in AB data file (beginning of range)

#of elements in range

#of first binary variable (VARB) in 6K (beginning of range, max value is 125)

EXAMPLE:

IF:

•Allen-Bradley PLC is server #2

•The PLC’s binary data file 3 has 30 elements. Use data elements 15-29 (15 elements total) for binary data that is to be shared with the 6K.

•Use the 6K’s binary variables 35-49 (15 variables total) to store the data

from the PLC.

The required mapping command is: 2NTMPRB3,15,15,35

The NTMPRB command maps a range of binary data elements from the AB PLC to a range of binary (VARB) variables in the

6K. There are 125 VARB variables available in the 6K for storing binary data. To perform a binary read from the PLC:

1.Assign the AB PLC a server number, according to its IP address (NTIP command).

2.Connect to the AB PLC, according to its server number (NTCONN command).

3.Map a range of binary elements in the AB PLC to a range of binary (VARB) variables in the 6K (NTMPRB command).

4.Start polling the AB device at a specific polling interval (NTPOLL command). This updates the 6K binary (VARB) variables with the binary element data from the AB PLC. You can then use the PLC binary data (via the VARB variables) in conditional expressions, command value substitutions and variable assignments.

Saved in Non-Volatile Memory

This command is saved in the controller’s non-volatile memory, and is remembered on power-up and RESET.

Potential Error Conditions:

•You are not allowed to map the same 6K VARB variables for read and write functions. Nor are you allowed to map the same 6K VARB variables to another PLC. If you attempt either of these conditions, the 6K will not accept the NTMPRB command and will transmit the error message “VARIABLE MAPPING CONFLICT…”.

•If you attempt to read from an AB data file of the wrong type, or read from a non-existent data element, the 6K will not accept the NTMPRB command, it will transmit the error message “ERROR, INVALID FILE TYPE, NUMBER OR SIZE…” and it will automatically stop polling all mapped binary and integer variables (equivalent to executing the NTMPRBi,i,0,i, NTMPWBi,i,0,i, NTMPRIi,i,0,i, and NTMPWIi,i,0,i, commands).

Control over Polling: If you want to stop the 6K from reading binary data from the PLC, but continue to exchange NTMPRI, NTMPWI and NTMPWB data, use the NTMPRBi,i,0,i command. If you need to stop polling all mapped variables, use the nNTPOLL0 command.

Example:	; Identify network server #2 as an Allen-Bradley PLC at
2NTIP1,172,54,125,34

page 22