BROSE Systeme PM 984 User manual

Instruction manual
PM 984
for version P0.90 bis P0.99
Manual PM984
State July 2002 - All subject to change without notice 1

Table of Contents
Brief Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Hexadecimal Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Measured-Value Processing Mode . . . . . . . . . . . . . . . . . . . . . . . . 3
Use as Agreed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Notes to Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Unpacking and Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Explanation and Correction of Errors . . . . . . . . . . . . . . . . . . . . . . . . 5
Error Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recall delivery state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Setting the Limit Values - SP1 / SP2 . . . . . . . . . . . . . . . . . . . . . . . . 8
Setting the Hysteresis of Limit Values - Hy.1 / Hy.2 . . . . . . . . . . . . . . . . 8
Scaling of Display -- SCAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setting the Zero Point Assignment -- null . . . . . . . . . . . . . . . . . . . 8
Setting the Full Scale Assignment - FS . . . . . . . . . . . . . . . . . . . . . . 8
Assigning the Zero Value of Analog Output -- A.nul . . . . . . . . . . . . . . 8
Assigning the End Value of Analog Output -- A.FS . . . . . . . . . . . . . . . 8
Leaving the Sublevel of SCAL Menu - EndE . . . . . . . . . . . . . . . . . . 8
Function Settings -- Func. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Setting the Input Filter -- FILt. . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Activating the Function of Control Input- CtrL . . . . . . . . . . . . . . . . . 9
Setting the Step Size / Rounding - StEP . . . . . . . . . . . . . . . . . . . . . 9
Activating the Sign - Sign . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Transmission Rate - bAUd . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Transmission Protocol - ProT . . . . . . . . . . . . . . . . . . . . 10
Setting the Communication Address - Adr. . . . . . . . . . . . . . . . . . . . 10
Setting Brightness of Display - HeL. . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Relay Function - rEL.1 / rEL.2 . . . . . . . . . . . . . . . . . . . 11
Manual PM984
State July 2002 - All subject to change without notice 1

Leaving the Sublevel of Func Menu- EndE . . . . . . . . . . . . . . . . . . 11
System Settings -- SyS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Setting the Timeout (Maximum waiting Time for Data) - to . . . . . . . . . 12
Adjusting the Offset (Zero Position) of Analog Output - A.OFF . . . . . . . 12
Adjusting the Reference Slope (Full Scale) of Analog Output - A.rEF . . . . 12
Leaving the Sublevel of SYS Menu - EndE . . . . . . . . . . . . . . . . . . . 12
Determine the Safety Level - COdE . . . . . . . . . . . . . . . . . . . . . . . . 12
Saving the Settings - SAVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
V.24 Interface (similar to RS-232) . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting with Computer or Panel Unit . . . . . . . . . . . . . . . . . . . . . 13
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Addressed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Wiring Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
RS-485 Interface with Measurement-Bus Protocol . . . . . . . . . . . . . . . . . 14
Description of Commands for Interfaces . . . . . . . . . . . . . . . . . . . . . . 15
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Number Representation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Priorities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Reading / Setting the Operating Mode . . . . . . . . . . . . . . . . . . . . . . . 16
Mode 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Mode +128 (Initialization Mode) . . . . . . . . . . . . . . . . . . . . . . . . . 16
Reading / Setting the Measured Value . . . . . . . . . . . . . . . . . . . . . . . 17
Reading / Setting the Relay State . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Reading / Setting the Scale Factor . . . . . . . . . . . . . . . . . . . . . . . . . 19
Reading / Setting the Limit Values . . . . . . . . . . . . . . . . . . . . . . . . . 20
Reading / Setting the Configuration Register . . . . . . . . . . . . . . . . . . . 21
Reading the Instrument Version . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Reading / Setting the Parameter Block . . . . . . . . . . . . . . . . . . . . . . . 23
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Manual PM984
2State July 2002 - All subject to change without notice

Brief Description
The slave displaying instrument (instrument) distinguishes in principle two operating
modes:
The hexadecimal display mode and pure numerical measured-value processing mode.
Note: See also section Description of Commands for Interfaces.
Note: Further information is obtained from the data sheet.
The delivery state is the hexadecimal display mode.
Hexadecimal Display Mode
Following signs can be transmitted and displayed:
Sign: +, - or none
1st position: 1 (if larger then automatically given on 2nd position)
2nd to 5th position: 0 1 2 3 4 5 6 7 8 9 A a B b C c D d E e F f - and blank character
Decimal points: ., (all positions selectable)
The output is right aligned.
Examples: Transmission Display
-1.2345 -1.2345
+1.AB.CD +1.Ab.CD
123-45 123-45
+123 +123
…±1.8.8.8.8. (Test)
-123+45 Err.2 (Error: the sign "+ " cannot be represented)
Measured-Value Processing Mode
In this mode, the instrument functions like a measuring instrument that does not fetch
measured values from an A/D converter, but via a serial interface. Several functions such as
limit monitoring are provided.
Measured values (numbers) can be processed in the following ranges: ±0.0001 to ±19999
Examples: Transmission Display
-1.2345 -1.2345
123 + 0123
…±1.8.8.8.8. (Test)
-123+45 Err.2 (Error: invalid number format)
In addition to the measured value transmission, a series of interface commands is available.
Use as Agreed
See also data sheet. The manufacturer is not liable for damages that arise from improper
or regulation alien use.
Manual PM984
State July 2002 - All subject to change without notice 3

Safety Instructions
Do not carry out any arbitrary alterations on the instrument.
Observe the appropriate safety regulations of national standards when installing.
Have non-functional instruments inspected by the manufacturer.
Notes to Operating Instructions
Notes give you information to which you shall pay attention to when operating the in-
strument.
Attention indicates that you must follow the given statements, which serve, for your
own safety or for safety reasons of the instrument. Disregard can lead to injuries or to
damage of the instrument.
Installation
Attention: The installation of the instrument should be carried out by professionals
well versed in the appropriate safety regulations of the national standards for electrical
engineering.
Scope of Delivery
The scope of delivery includes:
-- Data sheet "PM 984"
-- Slave displaying instrument PM 984
-- Screw clips (clamping devices) located on the side of the instrument (see data sheet)
-- 10-pin plug-in screw clamp connector
-- Adhesive labels for the display unit (dimension) for the function of control input and
for the measured values, which are located on the upper side of the instrument
-- In addition, a 5-pin plug-in screw clamp connector is delivered for the /R and /K option
Unpacking and Disposal
Take the enclosed parts from the packaging and check parts for completeness. Contact the
customer service if the delivery is incomplete.
Attention: Dispose of the packing material in the corresponding containers for cardbo-
ard/paper and synthetic material.
Manual PM984
4State July 2002 - All subject to change without notice

Installation
Prior to installing the instrument into the switch panel, the corresponding adhesive labels
(see section Scope of Delivery) should be adhered to the luminous fields that are on the
right hand side of the display. To do this, remove the frame from the front panel, and re-
move the front screen by grasping the lower carving.
Cut and peel off labels as needed and adhere label, e.g. "V", to rectangular luminous field
on display, "Hold" label for the control input function (see chapter Activating the Function
of Control Input) to the bottom luminous field, and "SP1" or "SP2" for the measured value
(see section Setting the Measured Value) to upper luminous field.
Note: SP2 should be adhered to the top most luminous field.
To install the instrument into the switch panel, the panel shall be cutout according to the
drawing on data sheet. Remove the screws from the instrument and slide the instrument
into the cutout. Then reattach the screws and fasten the instrument with the screws to
the switch panel. Screwdriver can be used to tighten screw clips.
Note: Screw clamp assignment for the connections, e.g. power supply, is obtained from
the data sheet.
Attention: When connecting the supply voltage, the operating data given on the type
label, which is located on upper side of instrument, should be taken into account.
Getting Started
Settings are not necessary to get started, however, if the presetting is insufficient, the in-
strument has to be adapted to the applications.
After switching on or applying the supply voltage, the instrument runs a self-test; should
errors be detected, they are shown on the display. The error number and supplementary
number appear in succession. After 10 seconds, a self-test is repeated.
Explanation and Correction of Errors
Error Report
Error codes have the following meaning:
Err.0 EPROM defective or not correctly readable
Err.1 EEPROM defective or check sum is incorrect
Err.2 Incorrect or faulty transmission data
C.Err Incorrect input of codes for the safety level
(see section Setting the Safety Level)
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State July 2002 - All subject to change without notice 5

Error Correction
If Err.0 or Err.1 are displayed, the instrument should be taken out of service and sent to
the manufacturer.
If Err.2 is displayed, the data and transmission parameters or interface operating mode
(see section Description of Commands for Interfaces, item Operating Mode) should be
checked.
Recall delivery state
In Service Mode (see section "Determine the Safety Level") the delivery state can be
loaded by entering Code +3210 and saved by selecting SaVe.
Handling
1. Remove small cap on front screen and or compete front screen to gain access to the
turn/press switch (switch) to perform settings.
2. Use a small insulated screwdriver to carry out settings.
3. Press the switch with the screwdriver to invoke the first menu; turn the switch to run
through the menus (see section Menu Structure).
4. Push to activate currently displayed menu and the first menu item will appear.
5. Turn or press the switch once again to carry out the settings in the individual menu
items.
6. The display flashes, and can be changed by turning.
7. Numeric settings such as limit values are carried out dynamically, i.e. the quicker the turn-
ing the larger the numeric steps.
8. The number input is accepted when the switch is pressed again, thereafter the previouse
activated menu reppears.
9. The settings are stored permanently only after the SAVE menu is invoked and the
switch is pressed.
10.If the switch is not actuated within 10 seconds, the menu and the instrument restarts
with a reset if necessary and the old values.
Attention: If the instrument is opened, conducting parts that lie on the electrical po-
tential of the measuring input will be exposed and can be touched.
If the settings are carried out with non-insulated screwdriver, the conducting parts that
lie on the electrical potential of the measuring input can be touched.
Menu Structure
The instrument has several operating modes that are activated with corresponding codes.
Only those menu items are displayed that are enabled for the set safety level.
Note: The delivery state is the service mode.
Manual PM984
6State July 2002 - All subject to change without notice

Note: Themenus
areonlyactive, ifcorresponding relayfunctionshave
beenset.
Sp1 Sp1 Sp2 Sp2 HY1 HY2 /,/and / ^ ^
Protectedmodewithcode+98
Normalmodewithcode+1234
Servicemodewithcode+12049 Note:Onlythemenus
and are active.
CODE
SAVE
ServiceMode
ProtectedMode
Press theturn/press switchwith
screwdriver
Turntheturn/press switchwith
screwdriver
Legend:
Manual PM984
State July 2002 - All subject to change without notice 7

Setting the Limit Values - SP1 / SP2
In this menu, the corresponding limit values (break over points) can be set. When the toler-
ance range monitoring is activated, corresponding limit value pairs are made available, dur-
ing which the upper and lower limit values are assigned automatically (see section Setting
the Relay Functions rEL.1 / rEL.2).
Note: The menu SP1 / SP2 is displayed only if the functions, limit high and limit low,
were set in advance in the menu Func at rEL.1 or rEL.2 and the protected mode is
not activated. To represent the switch point of the limit value on the display, the corre-
sponding label should be adhered to corresponding luminous field as described in sec-
tion Installation.
Setting the Hysteresis of Limit Values - Hy.1 / Hy.2
In this menu, the default value of the switching hysteresis for the corresponding limit value
or limit value pairs can be set. Only positive values are possible. For a failure-free limit
monitoring, the value shall never be greater than the measuring range or half of the toler-
ance range (see Setting the Relay Function -- rEL.1 / rEL.2)
Note: The menu Hy.1 / Hy.2 is displayed only if the functions, limit high and limit low,
were set in advance in the menu Func at reL.1 or reL.2 and the protected mode is
not activated.
Scaling of Display -- SCAL
Setting the Zero Point Assignment -- null
The display value can be set at measuring input 0.
Setting the Full Scale Assignment - FS
The display value can be set at end scale value (+20000)
Assigning the Zero Value of Analog Output -- A.nul
The display value can be set at the analog output that is to output its minimum value.
Assigning the End Value of Analog Output -- A.FS
The display value can be set at the analog output that is to output its maximum value.
Leaving the Sublevel of SCAL Menu - EndE
Execute EndE to leave the sublevel for settings and to return to menu SCAL starting posi-
tion.
Manual PM984
8State July 2002 - All subject to change without notice

Function Settings -- Func.
Setting the Input Filter -- FILt.
For the display to show stable values when the measured values are fluctuating, an averag-
ing of 1 to 127 measurements can be set. This does not have an effect on the measuring
rate or display rate of instrument except that the setting time is changed.
For negative values, the filter has a jump function, which enables the display to instantly
follow the measured values when they are radically changing.
Activating the Function of Control Input- CtrL
Following functions are available for the control input:
•Display Hold -- hold
When the function hold is activated, the currently displayed value freezes. The mea-
suring, limit monitoring and interface communication (not with BCD) still continue.
•Maximum Value Storage -- Hi
When the function Hi is activated (edge triggering), the statistic storage
(min/max/average) is erased. As long as Hi is active, the maximum value is displayed.
•Minimum Value Storage - Lo
When the function Lo is activated (edge triggering), the statistic storage
(min/max/average) is erased. As long as Lo is active, the minimum value is displayed.
•Average Value Storage - AV
When the function AV is activated (edge triggering), the statistic storage
(min/max/average) is erased. As long as AV is active, the average value is displayed.
•Decimal Point Switching - dP
When the function dP is activated (edge triggering), the decimal point switches to
the second decimal point level, making it possible to change the decimal point posi-
tion when switching over to a different measuring point.
•Tare Function - tArA
When the feature tArA is activated (edge triggering), the currently display value is
zeroed, that means the currently attached measuring value is gauged for zero. As
long as the control line is active, the tared value is output.
•Limit Value Exchange - ALt
When the function ALt is activated, the limit values of both relays are switched
around during limit range monitoring. That means, if for example relay 1 is configu-
red to Hi1 (see section Setting the Relay Function), it responds to Hi2 when the con-
trol input is active.
Note: The lower luminous field on the display shows the set status of control line. By
adhering the corresponding label (see section Installation), the active function can be
represented on the display (min/max/av/tara/Alt).
Following labels are supplied: Ctrl, Hold, Min, Max, Av, Tara and Alt.
The delivery state for the status of control line is hold.
Setting the Step Size / Rounding - StEP
The last position of the display value can be set to steps of 1, 2, 5 or 10 so that the round-
ing of the last position with steps of 2 are 0, 2, 4, 6 and 8, with steps of 5 are 0 and 5, and
with steps of 10 is 0.
Manual PM984
State July 2002 - All subject to change without notice 9

Activating the Sign - Sign
Which sign (+, -, or + -) is to be represented can be set. If for example the plus sign (+) is
disabled, plus sign is not displayed with positive values, however the minus sign (-) is still
displayed with negative values.
Setting the Transmission Rate - bAUd
The transmission rate for the serial port can be set to 300, 600, 1200, 2400, 4800, 9600,
19200, or 57600 bits per second (baud).
Note: The delivery state for the transmission rate is 9600 baud.
Setting the Transmission Protocol - ProT
The most used transmission protocols with 7 or 8 data bits and none (n), even (E) and odd
(0) parity and 1 or 2 stop bits for the serial interface can be set.
Representation Example: 7.E.1
Note: The delivery state is 7data bits, even parity (E) and 1stop bit.
Setting the Communication Address - Adr.
The address for the serial interface at which the instrument is to be addressed can be set.
The address 0 disables the addressing of the serial interface, or when a fieldbus is itegrated
only broadcast messages are processed.
Note: The delivery state for the address is 0.
Note: Changes to settings for bAUd, Prot, or Adr come into effect only after reset is
carried out and have no effect on the BCD bus or if there is no serial interface.
A reset is triggered by interrupting the supply voltage until the display is dark and con-
necting the supply voltage or switching on again.
Setting Brightness of Display - HeL.
The brightness of display can bet changed in the range from 0 = verry light to 5 = verry
dark.
Note: The delivery state for the brightness is 2.
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Setting the Relay Function - rEL.1 / rEL.2
Functions for the response of the relay can be set as follows:
•Off -OFF
The corresponding relay is always passive
•On - ON
The corresponding relay is always active when the instrument is on and ready for ser-
vice.
•Exceeding the High Limit Value - Hi1 / Hi2
Whenever the set limit value is reached, the relay switches to its active state. The first
or second limit value can be set. The relay returns to rest position only after the mea-
sured value falls below the high limit value and the amount of the hysteresis.
•Exceeding the Low Limit Value - Lo1 / Lo2
Whenever the set limit value is reached, the relay switches to its active state. The first
or second limit value can be set. The relay returns to rest position only after the mea-
sured value has risen above the low limit value and the amount of the hysteresis.
•Maintaining the Tolerance Range - Go1 / Go2
As long as the measured value remains within the set limits (tolerance range), the re-
lay is in its active state. The hysteresis is also active here.
•Exceeding the Tolerance Range - HL1 / HL2
As long as the measured value remains within the set limits (tolerance range), the re-
lay is passive. When the set limits are reached and exceeded, the relay switches to its
active state. The hysteresis is also active here.
Note: Only with the tolerance range monitoring are limit value pairs made available.
Leaving the Sublevel of Func Menu- EndE
Execute Ende to leave the sublevel for settings and to return to menu Func starting posi-
tion.
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State July 2002 - All subject to change without notice 11

System Settings -- SyS
Setting the Timeout (Maximum waiting Time for Data) - to
To limit the waiting time for data, a maximum time in seconds can preset after which
"----" is displayed.
Note: The delivery state is no timeout.
Adjusting the Offset (Zero Position) of Analog Output - A.OFF
The offset (zero position) of analog output can be adjusted. The output amount changes
during setting. Therefore, it is necessary to monitor the output amount with measuring in-
strument.
Adjusting the Reference Slope (Full Scale) of Analog Output - A.rEF
This setting is carried out like the offset setting.
Note: The offset output setting remains unchanged, therefore should be adjusted first.
Leaving the Sublevel of SYS Menu - EndE
Execute EndE to leave the sublevel for settings and to return to menu SYS starting posi-
tion
Determine the Safety Level - COdE
With the input of corresponding codes (see Menu Flow Chart), the modes are changed ac-
cordingly. If invalid code is entered, C.Err is displayed for 1 second. The menu COde is
shown again on the display.
Note: The delivery state is the service mode.
Saving the Settings - SAVE
Only after selecting this menu, the made settings are saved permanently in the internal
EEPROM. The instrument indicates the successful saving by a brief interruption of the dis-
play and subsequently leaves the menu SAVE.
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12 State July 2002 - All subject to change without notice

V.24 Interface (similar to RS-232)
In menu Func, the communications parameters such as baud rate, data bits, parity, stop
bits and the address can be set.
Connecting with Computer or Panel Unit
The maximum connection shown in Fig. 1 can be minimized by local bridging of the con-
trol lines CTS with RTS and DTR with DSR as shown in Fig. 2.
Attention: On the unit side, CTS and RTS shall not be bridged as RTS reflects the current
interface status and is not static.
Normal Operation
In this processing mode, the address 0 is set. The instrument operates with a point-to-
point connection, i.e. the instrument is connected directly with a data source.
PCInstrument
Fig. 1
PCInstrument
Fig. 2
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State July 2002 - All subject to change without notice 13

Addressed Operation
This processing mode is activated by setting the address > 0 in menu Func under menu
item Adr.
Addressing
The address is placed in front of each command line. The first address is A, the second B,
then C and so forth (according to ASCII characters as of 41H), followed by a colon and the
actual command; practically like a DOS command line with indication of drive on a PC.
Example:
B:?<CR> Read version of instrument with address 2.
Wiring Principle
The units are connected as a ring bus with a
computer, i.e. each outgoing line is connected
to the reception line of the next instrument, as
shown in Fig. 3. All received characters are de-
livered delayed by one character from every
unit. This way, all characters of the computer
go through the instrument and back to the
computer again. For the support of the hard-
ware handshake, the control lines RTS and CTS
should be looped through analogous to the
data lines instead of the bridge (broken line in
Fig. 3)
RS-485 Interface with Measurement-Bus Protocol
This interface provides secure data transfer with the protocol in accordance with
DIN 66348. The RS-485 interface is designed with 4-wire technology (similar to RS-422).
PCInstrument1
Instrument2
Instrumentn
Fig. 3
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14 State July 2002 - All subject to change without notice

Description of Commands for Interfaces
General
For the communication with the instrument, which is carried out in ASCII, a series of com-
mands is available. Each of these commands can be seen as an internal variable of the in-
strument, which can be accessed via the interface. In principle, each command can be used
for reading/writing and setting. During reading, only the command or the variable is
given; during writing, this command is assigned with another value with "=".
In principle, the commands are structured as follows:
Command [expansion] channel number for reading
Command [expansion] channel number = parameter for writing/setting
When writing/setting commands, the instrument confirms the execution of the command
by returning "OK". With reading commands, the reply occurs with the content of vari-
ables.
It is possible to combine several commands, which are separated by a comma, in one com-
mand line. The command line is processed from left to right. The receiving buffer can only
hold a maximum of 20 characters. Therefore, the response to several read commands in
one command line are several answers. When several write/set commands are in one com-
mand line, only the acknowledgement for the command line is output. Should a syntax er-
ror appear in the command line, then the message syntax error is output and the
processing of the command line is stopped. If in normal operation, an initialization com-
mand is sent, the instrument returns the message "permission denied".
Note: To test the communication with the instrument, terminal programs for DOS and
Windows are offered on the homepage (see section Customer Service).
Number Representation
In principle, the internal number representation is in integer format, i.e. in the value range
from +32767 to -32768. The values +32767 and -32768 are interpreted as +OVER or -OVER
(over range or overflow of the number format). The sign is always given by the instrument
for those numbers marked with signs and can be omitted when writing/setting positive
numbers. The decimal point is represented as ASCII character (decimal 46).
Priorities
While making settings via the menu, there is no transmission via the interface.
Manual PM984
State July 2002 - All subject to change without notice 15

Reading / Setting the Operating Mode
Syntax:
M <CNo.> ( = <Mode>)
M Command
<CNo.> Channel number 0
=<Mode> Set optional mode (0 - 255), otherwise read
The response of the instrument’s interface is determined by the mode. The used mode is
maintained even when switching on again. The indication of the channel number repre-
sents only a formal parameter, which should always be 0 with this instrument.
The mode is shown as positive number in the range from 0 to 255.
Example: Set mode to 129
Computer: M0=129
Instrument: OK
Read mode
Computer: M0
Instrument: 129
Following modes are provided:
Mode 0
In this mode, the instrument operates in hexadecimal display mode (see chapter Brief De-
scription). Only limited interface commands are available.
Mode 1
In this mode, the instrument operates in numerical measured-value processing mode (see
section Brief Description)
Mode +128 (Initialization Mode)
To invoke the corresponding initialization mode, 128 has to be added to each mode, for ex-
ample1 and 0 (mode 0 @ 128, mode 1 @ 129,…). See also example in section Reading/Set-
ting the Operating Mode.
In this mode, the instrument operates as in the mode <128, however it is also possible to
use the initialization commands, which are:
ESet measurement unit
SScaling of measured value
GSet limit values
KSet relay configuration register
PSet parameter block
Manual PM984
16 State July 2002 - All subject to change without notice

Reading / Setting the Measured Value
Note: Not available in the mode 0 and 0 +128
Syntax:
W [L | H | M ]<CNo.> [ = R | <Value>]
WCommand
L Minimum value, optional, otherwise current measured value
H Maximum value, optional, otherwise current measured value
M Average value, optional, otherwise current measured value
<CNo.> Channel number 0
= R | <Value> Set to optional value (floating comma number), otherwise read
The instrument provides the following measured values:
Current measured value
Minimum measured value
Maximum measured value
Average measured value (max. over 3,3 million values)
The values are replied in ASCII format with sign followed by decimal point. In addition,
the possibility to set and reset the values is given in order to restart or re-initialize the gen-
eration of maximum value, minimum value and average value. The values must be given
as integer value (range of values + 32767 to -32768). An equal number of decimal posi-
tions are assumed like the ones that were set for the scaling.
Example: Read current measured value
Computer: W0
Instrument: +5788 mm
Reset average measured value
Computer: WM0=R
Instrument: OK
Read average measured value
Computer: WM0
Instrument: +3762 m/s
Manual PM984
State July 2002 - All subject to change without notice 17

Reading / Setting the Relay State
Note: Not available in mode 0 and 0 +128!
Syntax:
R <RNo.> [= 0 | 1 ]
RCommand
R <RNo.> Relay number 0 or 1
= 0 | 1 Set | reset optional relay state, otherwise read
The relay states of instrument can be inquired or influenced by this command. The relay
state is indicated in Boolean form, i.e. relay OFF = 0, and relay ON = 1.
Note: Make sure that the response of the relay is carried out just as with the limit moni-
toring. If the relays are to respond exclusively via the interface, then the corresponding
relay should be configured to OFF (passive). (See section Reading / Setting Configura-
tion of Register and Relay Functions)
Example: Read relay state of relay 0 (here OFF!)
Computer: R0
Instrument: 0
Set relay state of relay 0 to ON
Computer: R0=1
Instrument: OK
Manual PM984
18 State July 2002 - All subject to change without notice