[N] Parameters for PLC Tag Addressing

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[N] Parameters for PLC Tag Addressing

N1

Mode 1 (one)

RP570: RTU address, between 1 (one) and 255 or RP571: RTU router, between 1 (one) and 255

Mode 2 (two)

RP570: RTU address, between 1 (one) and 255 or RP571: Partitioned value in RRPP format, where RR: RTU router, between 1 (one) and 255 (high byte of N1) and PP: RTU address, between 1 (one) and 255 (low byte of N1)

N2

Command number. For more information, please check table Commands for PLC Tags

N3

Parameter, if necessary

Mode 3 (three)

Partitioned value in LLNN format, where LL: Satellite line, between 1 (one) and 255 (high byte of N3) and NN: RTU satellite address, between 1 (one) and 255 (low byte of N3)

N4

Parameter, if necessary

 

RTU data and events must be requested by polling with PLC Tags using the N2 parameter equal to 0 (zero, RA: Request, priority level 1) or the N2 parameter equal to 8 (eight, RB: Request, priority level 2), according to the scan time of these Tags.

For immediate requests, that is, without polling, use a PLC Tag with the N2 parameter equal to 4 (four, RX: Request X) and select the data type using the N3 parameter.

Commands for PLC Tags

N1

N2

N3

N4

Mode

Mode 1

0 (RA: Request A)

Not used

Not used

Reading

Type of reply. Possible values are 0: CCR1 (Cycle Complete Response priority level 1), 15: NACK (Negativ Acknowledge), or n: Event number received

Mode 2

4 (RX: Request X)

Type of data. Possible values are 0: Indications (not supported by RTU 200), 1: Pulse Counter Values (not supported by RTU 200), 2: Analog Values (not supported by RTU 200), 3: Digital Values (not supported by RTU 200), 4: SUB-RTU polling status, or 5: SUB-RTU polling acknowledgment

Block number

Reading

Type of reply. Possible values are 4: NXR (Not Executed Response) or N: Event number received

Mode 1

8 (RB: Request B)

Not used

Not used

Reading

Type of reply. Possible values are 1: CCR2 (Cycle Complete Response priority level 2), 15: NACK (Negativ Acknowledge), or N: Event number received

Mode 2

1 (SPM: Setpoint Message)

Object number

Type of data format to write. Possible values are 0: Digital Output (15-bit unsigned integer or 8-bit unsigned integer for RTU 210) or 1: Analog Output (12-bit signed integer)

Writing

Possible values for N4 equal to 1 (one) range from -2048 to 2047

Mode 2

3 (IHC: Inhibit Command)

Object number

Not used

Writing

Mode 1

7 (RSEQ: Reset Sequence Number)

Not used

Not used

Writing

Mode 2

9 (IXC: Immediate Execute Command)

Object number

Type of Command. Possible values are 0: Object command, 1: Regulation command, or 9: Stop running command immediately, ignoring written value (not supported by RTU 400)

Writing

Possible values are 0: Off or 1: On

Mode 2

11 (GOM: General Output Message)

Object Number

Type of data format to write. Possible values are 0: Analog Output (12-bit signed integer, not supported by RTUs 210 and 110, only positive values for 23AA00 in RTU 200, for bi-polar use 23AA20), 1: Single Indication (zero for low output and one for high output), 2: Double Indication (zero for low output and one for high output, not supported by RTU 210), or 3: General Output (16-bit unsigned integer or 8-bit unsigned integer for RTU 210)

Writing

Mode 1

12 (TSI: Time Sync Instruction)

Not used

Not used

Writing

Mode 2

13 (EXC: Execute Command)

Object number

Not used

Writing

Possible values are 0: Off or 1: On

Mode 2

15 (SCI: Status Check Instruction)

Not used

Not used

Reading

Possible replies. Possible values for RP571 are 13: ACK (Positive Acknowledge) or 15: NACK (Negative Acknowledge) and possible values for RP570 or RP571 are 3: EXR (Executed Response) or 2: EXRR (Executed Response, RTU restarted, EXRR not supported by RTU 200)

Mode 2

601 (FCOM 1: Cold start)

Mode 3

Not used

Writing

Mode 2

602 (FCOM 2: Activate RTU)

Not used

Not used

Writing

Mode 2

603 (FCOM 3: End of period or intermediate reading of pulse counters)

Not used

Not used

Writing

Possible values are 1: Intermediate or 2: End of period

Mode 2

604 (FCOM 4: Generate an event message with PROM version identification)

Mode 3

Not used

Writing

Mode 2

605 (FCOM 5: Activate or deactivate local printer)

Mode 3

Not used

Writing

Possible values are 1: Activate or 2: Deactivate

Mode 2

606 (FCOM 6: Start PMR freeze)

Not used

Not used

Writing

Possible values are any 16-bit value, between 0 (zero) and 65535. Bit grouping is 15: 1 to 16, 14: 1 to 15, 13: 1 to 14, 12: 1 to 13, 11: 1 to 12, 10: 1 to 11, 9: 1 to 10, 8: 1 to 9, 7: 1 to 8, 6: 1 to 7, 5: 1 to 6, 4: 1 to 5, 3: 1 to 4, 2: 1 to 3, 1: 1 to 2, 0: 1 to 1. Not supported by RTU 200 and 210

Mode 1

608 (FCOM 8: New configuration for loop reversal unit)

Not used

Not used

Writing

Possible values are any 8-bit value, between 0 (zero) and 255. Bit grouping is 0 and 1: 1 (one) connects line 1 (one) to central system and 2 (two) connects line 2 (two) to central system, 2 and 3: 1 (one) connects transmission to line 1 (one), 2 (two) connects transmission to line 2 (two), and 3 (three) connects transmission to line 3 (three), or 4 and 5: 1 (one) disconnects transmission from line 1 (one), 2 (two) disconnects transmission from line 2 (two), and 3 (three) disconnects transmission from line 3 (three). RTU 200 only supports lines 1 (one) and 2 (two)

Mode 2

609 (FCOM 9: Freeze and send sysmess queue)

Mode 3

Not used

Writing

For RTU 200, the queue is never frozen

Mode 1

611 (FCOM 11: Telephone hang up, only when DATEX-connection)

Not used

Not used

Writing

Possible values are 0: No changes, 1: Out of service, stop active call up, or 2: On service, start active call up

Mode 2

613 (FCOM 13: Subordinate RTU in or out of service)

Mode 3

Not used

Writing

Possible values are 1: On service or 2: Out of service (not supported by RTU 210)

Mode 2

614 (FCOM 14: Status check on satellite)

Mode 3

Not used

Writing

Not supported by RTU 210

Mode 2

615 (FCOM 15: Connect or disconnect mobile radio connection)

Not used

Line number

Writing

Possible values are 1: Connect or 2: Disconnect (not supported by RTUs 200 and 210)

Mode 2

616 (FCOM 16: Generate an event message with line statistics)

Not used

Line number

Writing

Mode 2

617 (FCOM 17: Repeat all pulse counter values from an end of period interval earlier than given time. Day zero means repeat all stored counters)

Not used

Not used

Writing

Writing in date and time format

Mode 2

618 (FCOM 18: deactivate RTU, accept a complete set of FTABs)

Not used

Not used

Writing

Mode 2

619 (FCOM 19: Database version)

Not used

Not used

Writing

Writing in date and time format

Mode 2

620 (FCOM 20: Switch main line)

Not used

Not used

Writing

Possible values are 0: Switch to A or 1: Switch to B

Mode 2

621 (FCOM 21: Enable or disable automatic switching)

Not used

Not used

Writing

Possible values are 0: Enable automatic switching or 1: Disable automatic switching

Mode 2

622 (FCOM 22: Setting Summer time and normal time. This command is sent twice with different time settings)

Not used

Relative adjustment, in minutes

Writing

Writing in date and time format

Mode 2

623 (FCOM 23: Set Primary Mode)

Not used

Not used

Writing

Possible values are 1: Set primary mode or 2: Report current state without changes

Mode 2

710 (Set initial address of memory for request of the MCM by FCOM 10)

Not used

Not used

Writing

Initial memory address

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