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PM390 Manual Notes

PREFACE
PM390 Operating Guide
Revision 1.10
December 1999
This manual represents your meter as manufactured at the time of publication. It
assumes standard software. Special versions of software may be fitted, in which
case you will be provided with additional details.
Every effort has been made to ensure that the information in this manual is
complete and accurate. We revised this manual but cannot be held responsible
for errors or omissions.
The apparatus has been designed and tested in accordance with IEC 1010-1,
Safety Requirements for Electrical Equipment for Measurement, Control and
Laboratory Use. This operating guide contains information and warnings which
must be followed by the user to ensure safe operation and to maintain the
apparatus in a safe condition.
We reserve the right to make changes and improvements to the product without
obligation to incorporate these changes and improvements into units previously
shipped.

General Editor : Ian Sykes BSc (hons).
Copyright © 1999 : Northern Design (Electronics) Ltd,
228 Bolton Road, Bradford. West Yorkshire. UK. Contents
Page 2 Contents

1. SAFETY .............................................................................................................. 4
1.1 W
ARNING
S
YMBOLS
............................................................................................. 4
1.2 M
AINTENANCE
..................................................................................................... 4
2. METER OPERATION.......................................................................................... 5
2.1 M
EASUREMENTS
.................................................................................................. 5
2.2 D
ISPLAY
P
AGES
................................................................................................... 6
2.3 D
ISPLAY
M
ENUS
................................................................................................ 11
2.4 D
YNAMIC
D
ISPLAYS
........................................................................................... 12
2.5 R
EFERENCE
LED (REF).................................................................................... 12
2.6 N
ON
-V
OLATILE
M
EMORY
.................................................................................... 13
2.7 R
EAL
T
IME
C
LOCK
............................................................................................. 13
2.8 R
OLLING
A
VERAGE
D
EMAND
.............................................................................. 13
2.9 A
UTO
R
OTATION
................................................................................................ 14
2.10 B
ALANCED
V
OLTAGE
M
ODE
.............................................................................. 14
3. INSTALLATION ................................................................................................ 15
3.1 P
ANEL
M
OUNTING
.............................................................................................. 15
3.2 C
ONNECTION
..................................................................................................... 17
3.3 S
CHEMATICS
..................................................................................................... 20
4. ISOLATED RELAY OUTPUTS (OPTIONAL)................................................... 26
4.1 G
ENERAL
D
ESCRIPTION
..................................................................................... 26
4.2 P
ULSE
O
UTPUTS
................................................................................................ 26
4.3 A
LARM
O
UTPUTS
............................................................................................... 26
4.4 C
ONNECTING
T
HE
R
ELAYS
................................................................................. 27
5. ANALOGUE OUTPUTS (OPTIONAL).............................................................. 28
5.1 G
ENERAL
D
ESCRIPTION
..................................................................................... 28
5.2 C
ONNECTING
T
HE
A
NALOGUE
O
UTPUTS
............................................................. 29 Contents
Contents Page 3
6. PROGRAMMING...............................................................................................31
6.1 D
ESCRIPTION
.....................................................................................................31
6.2 E
NTERING
P
ROGRAMMING
M
ODE
........................................................................32
6.3 S
ELECTING
P
ROGRAMMING
O
PTIONS
..................................................................32
6.4 E
XITING
P
ROGRAMMING
M
ODE
...........................................................................32
6.5 D
ISABLING
P
ROGRAMMING
.................................................................................33
6.6 S
ETTING
T
HE
CT. P
RIMARY
C
URRENT
................................................................34
6.7 S
ETTING
T
HE
PT. R
ATIO
....................................................................................35
6.8 R
ESET
E
NERGY
R
EGISTERS
...............................................................................36
6.9 R
ELAY
O
UTPUT
S
ET
-
UP
......................................................................................37
6.10 T
OGGLE
CT A
UTO
R
OTATION
...........................................................................44
6.11 T
OGGLE
B
ALANCED
V
OLTAGE
M
ODE
................................................................45
6.12 A
NALOGUE
O
UTPUT
S
ET
-
UP
.............................................................................47
6.13 S
ETTING
T
HE
M
ETER
C
OMMUNICATION
C
HANNEL
..............................................52
6.14 S
ETTING
T
HE
R
EAL
T
IME
C
LOCK
(RTC)............................................................52
6.15 S
ETTING
T
HE
MD
AND
R
OLLING
A
VERAGE
I
NTEGRATION
P
ERIOD
.......................55
6.16 R
ESET
M
AXIMUM
D
EMAND AND
R
OLLING
A
VERAGE
R
EGISTERS
.........................57
7. SERIAL COMMUNICATION .............................................................................59
7.1 I
NTRODUCTION
...................................................................................................59
7.2 C
OMMUNICATION
A
DDRESS
................................................................................59
7.3 D
ATA
F
ORMAT
...................................................................................................59
7.4 RS232 ..............................................................................................................59
7.5 RS485 ..............................................................................................................60
7.6 RS422 ..............................................................................................................62
7.7 C
OMMUNICATION
P
ROTOCOL
..............................................................................63
7.8 D
ATA
T
ABLES
....................................................................................................67
7.9 RTU C
OMMANDS
...............................................................................................79
7.10 E
XCEPTION
R
ESPONSES
..................................................................................84
8. SPECIFICATION ...............................................................................................85
Safety
Page 4 Safe Operation of the Meter
1. Safety
1.1 Warning Symbols
This manual provides details of safe installation and operation of the meter.
Safety may be impaired if the instructions are not followed. Labels on individual
meters give details of equipment ratings for safe operation.
Take time to examine all labels on the meter and to read this manual before
commencing installation.

Figure 1.1 Safety Symbols

WARNING
The meter contains no user serviceable parts. Installation
and commissioning should be carried out by qualified
personnel
1.2 Maintenance
The equipment should be maintained in good working order. Damage to the
product should be repaired by the manufacturer or authorised agent. The front
panel of the PM390 may be cleaned by wiping lightly with a soft cloth. No
solvents or cleaning agents should be used. All input and supplies must be
isolated before cleaning any other part of the equipment.
Operation
Using The Meter Page 5
2. Meter Operation
2.1 Measurements
The PM390 makes use of a high speed micro-processor and an Analogue to
Digital converter to monitor input signals from three independent phases. Each
phase voltage, current and power