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B. TRANSMISSION CHARACTERISTICS

All data is ACSII characters
9 selected asynchronous baud rates
1 start bit, 8 data bits, 1 stop bit
Modem controls not used
Maximum information block size - 256 bytes
Data must be transmitted as a block - no pause allowed

C. RECORD CONSTRUCTION -

3 parts: Header,Data,Trailer

1. HEADER:

2 bytes - Always 1st and 2nd byte transmitted

Byte 1 = 0-9 (30-39 HEX) Address of meter for RS422/RS485

muti-drop configuration
This is set via DIP switch
on main PC board

Byte 2 = "+" (2B HEX)

Start of record indicator

TRAILER:

5 bytes - Always follows data portion of record

Byte 1 = "(" (28 HEX)

Indicates start of checksum

Byte 2 = 0-9 (30-39 HEX)

A-F (41-46 HEX)

1st digit of checksum

Byte 3 = 0-9 (30-39 HEX)

A-F (41-46 HEX)

2nd digit of checksum

Byte 4 = ")" (29 HEX)

Indicates end of checksum

Byte 5 = cr (OD HEX)

Carriage return

3. Data

- COMPUTER GENERATED

The data portion of the record is made up of data requests, data entry, etc. This
consists of a data type character followed by a command character.

a. DATA TYPE CHARACTER - @,A,B---Z,[,\,],^,_ (40-5F HEX)
32

possible

b. COMMAND CHARACTER -

(20-39 HEX) Presently 8 possible

"!"

(21 HEX)

Clear DATA TYPE data to zero

(22 HEX)

Send DATA TYPE data - with spaces

Содержание MoniTTor N269

Страница 1: ......

Страница 2: ......

Страница 3: ...N269 Installation and Operations Manual...

Страница 4: ...THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 5: ...he Setpoints and Zones Page 15 2 The Relays Page 16 a Setting the Relay Timers Page 17 b Setting the Relay Preset Counters Page 17 C Other Setpoints Page 17 1 High Setpoints Page 17 2 Low Setpoints Pa...

Страница 6: ...34 7 Peak Mode Page 34 F Calibration Page 35 1 Pre calibrated Load Cells Page 35 2 Calculated Calibrations Page 36 3 Calibration using Reference Load Cells Page 36 G Computer Interface Hookup Page 37...

Страница 7: ...3 INSTRUMENT IDENTIFICATION Name AUTOMATIC PROCESS CONTROL LOAD MONITOR Model No N269 Serial No Date Shipped Company name street address city state zip telephone number Purchase Order No Invoice No...

Страница 8: ...LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANT ABILITY OR FITNESS FOR A PARTICULAR PURPOSE ALL SUCH WARRANTIES ARE HEREBY DISCLAIMED AND EXCLU...

Страница 9: ...2...

Страница 10: ...3...

Страница 11: ...4...

Страница 12: ...ANALOG TRACK OUTPUT TOP ROW ALL PINS GROUND BOTTOM ROW ALL PINS GROUND LO HI GAIN SWITCH B BALANCE ADJUST POT G GAIN ADJUST POT 1 2 3 4 L H B G 1 1 2 3 4 R W G B S CHAN 1 CHAN 2 R W G B S S SHIELD B...

Страница 13: ...6...

Страница 14: ...7...

Страница 15: ...K HIGH REV LOW TRACK ENTER SHUNT 7 8 9 4 5 6 1 2 3 0 CLEAR SW31 6 UP MASTER RESTART A B J3 A B J5 A B J4 SWITCH SW31 SETTINGS REJECT DE IN J2 TRANSMIT TO MAIN PC ENABLE POS A RS422 POS B RS232 J3 TRAN...

Страница 16: ...ater than setpoint 6 or less than setpoint 3 REject Relay has a timer SHUTdown Relay has a 1 9 preset counter The meter has 5 relays 2 for the REject zone and 1 for each of the DEcrease INcrease and G...

Страница 17: ...D comes on track LED goes off SETUP MODE press SETUP LED toggles on off if on in SETUP mode REVERSE MODE press REV LED toggles on off if on in REVERSE mode AVERAGE TONNAGE DISPLAY press LOW COUNT 0 or...

Страница 18: ...CREASE GOOD ZONE COUNT GOOD DE INCREASE GOOD ZONE COUNT GOOD IN OK ZONE COUNT GOOD GOOD DECREASE ZONE COUNT COUNT DE DE RELAY COUNTERS To display press GOOD PART COUNT GOOD REJECT COUNT REJECT DECREAS...

Страница 19: ...he setting of the decrease preset counter The INcrease relay will operate only when the load has been in the increase zone the same number of times in a row as is set on the increase preset counter Th...

Страница 20: ...scribed above The N269 can display strokes per minute the accumulated downtime time since the last stroke and the last alarm load value The highest load and the lowest load is also stored in the memor...

Страница 21: ...PLAY When the operator requests data rather than a mode change the display becomes a DATA DISPLAY For example if the N269 is displaying the PEAK load and you wish to view the HIGH SETPOINTS pressing t...

Страница 22: ...er a load is displayed in channel 0 Thus during normal operation the process control setpoints are displayed continuously Normally the setpoints are set such that setpoint 3 is greater than setpoint 4...

Страница 23: ...e increase zone 4 strokes in a row for the INcrease relay to operate Any load signal below setpoint 5 is in the increase zone Thus it is possible to have the INcrease relay operate when either the REj...

Страница 24: ...R To set the INcrease preset counter press the following keys TIME IN dec pt 0 9 ENTER To set the REject preset counter press the following keys TIME REJECT dec pt 0 9 ENTER Preset counter settings of...

Страница 25: ...essing the BYPASS key more than once will toggle that setpoint into and out of the BYPASS condition The LOW LED in the channel indicates the status of the BYPASS If the LOW LED is on then the channel...

Страница 26: ...returns to displaying loads 13 seconds after the ENTER key is pressed or when the RESET key is pressed The channel 0 LOW SETPOINT in the N269 is not really a LOW SETPOINT This setpoint is called the...

Страница 27: ...lue To bypass the pre determined counter press BYPASS before pressing the ENTER key The preset value of the pre determined counter may be viewed at any time This is done with the key sequence COUNT PR...

Страница 28: ...1 One counter counts the number of strokes in the decrease zone all loads above setpoint 4 and the other counts the strokes in the increase zone everything below setpoint 5 To view the decrease zone c...

Страница 29: ...onitor each stroke and indicate out of tolerance conditions in the display high and low LEDs but will not shut down the press when an out of tolerance load occurs If one stroke is out of tolerance cau...

Страница 30: ...at which the load signal crosses the threshold at the start of loading Thus when the amount of time since the threshold crossing elapses the meter reads the load value and stores this number in the m...

Страница 31: ...The proper TIME mode must also be selected to see the FIRST LEVEL loading FIRST LEVEL is TIME mode 1 To set the TIME mode press TIME the DEC PT and the number 1 to select TIME mode 1 Press ENTER to en...

Страница 32: ...ontrol is on the basis of the total load when in B4 mode For more information about the TIME VALUE refer to its own discussion elsewhere in the manual 3 AVERAGE LOADS The N269 meter can be set to disp...

Страница 33: ...oint which may be set to enable the counter to count only those strokes with load greater than the low setpoint and less than the high setpoint These setpoints operate on the basis of the load in chan...

Страница 34: ...display by pressing the proper key sequence at the keyboard To display the Last Alarm load information press the key sequence HIGH LOW or LOW HIGH The display will show the load which occurred in eac...

Страница 35: ...ch channel until the next press stroke occurs 5 THE LOWEST LOAD The lowest load seen in a particular channel 0 2 is stored in the N269 memory To display this information press the key sequence RESET L...

Страница 36: ...agnostic information The following table explains what each digit means DIGIT DATA DESCRIPTION 0 XXXX Main PC ROM checksum 1 X XXX Battery voltage in volts replace if less than 2 5 volts or greater th...

Страница 37: ...behind this plate The AC power line is connected to the rightmost 3 terminals labeled L1 L2 and GND Connect a good earth ground to the terminal labeled GND Connect the hot side of the AC line to the...

Страница 38: ...e T400 A to the terminal labeled 0 DO NOT under any circumstances reverse the RED and WHITE wires of the T400 A sensor A small 3 pin header with a 2 pin jumper block is located on the main PC board ab...

Страница 39: ...r can be 0 in which case no point is displayed 1 2 or 3 places To change this number press the decimal point key This digit only will now be lit Press the number key 0 3 which corresponds to the numbe...

Страница 40: ...f 0 This tells the N269 to use the probe input rather than the THRESHOLD for triggering 4 THE MAXIMUM CHANNEL NUMBER LOW LOW LOW 0 2 ENTER To display the MAXIMUM CHANNEL NUMBER press the key sequence...

Страница 41: ...hannel 0 Although each channel uses a separate shunt resistor all shunts are simultaneously engaged or disengaged with the SHUNT key switch Each channel has one shunt resistor which has a value of 1ME...

Страница 42: ...the 1 MEG shunt used in the N269 a conversion must be made When the proper number is determined the BALANCE and GAIN must be adjusted to read this number on the channel associated with the load cell P...

Страница 43: ...nding channel of the N114 and the totals match the meter is calibrated Now the calibration number for each channel must be recorded Put the N269 meter in TRACK mode Seal the GAIN pot of each channel w...

Страница 44: ...computer to the N269 The shield can be connected to the center GND terminal 3 SETUP PARAMETERS The N269 transmits data in blocks to the computer at speeds from 9600 to 115 200 baud Traditional modem...

Страница 45: ...SW 5 Down 8 SW 4 Down 16 To obtain an address 1 simply have SW11 8 down To obtain an address of 3 simply put 8 and 7 down Every switch downward will sum a higher address value If all the switches were...

Страница 46: ...ce is 1000 ohms Due to temperature changes in the sensing devices the no load signal will drift causing small shifts in the output voltage at the output jacks The span however 5 OV capacity will remai...

Страница 47: ...Byte 2 2B HEX Start of record indicator 2 TRAILER 5 bytes Always follows data portion of record Byte 1 28 HEX Indicates start of checksum Byte 2 0 9 30 39 HEX A F 41 46 HEX 1st digit of checksum Byte...

Страница 48: ...rt of checksum indicator NOTE Even though up to 248 bytes may be transmitted by the computer in the data portion of the record care must be used so as not to request more than 256 bytes of data from t...

Страница 49: ...Reject Decrease 0000 to 9999 lower 4 digits W 8 digit counts CHAN 3 Good Increase 0000 to 9999 upper 4 digits CHAN 4 Good Increase 0000 to 9999 lower 4 digits CHAN 5 Reject Increase 0000 to 9999 uppe...

Страница 50: ...4 digits CHAN 5 Decrease zone cnt 0000 to 9999 lower 4 digits CHAN 0 Batch count value 0000 to 9999 upper 4 digits CHAN 1 Batch count value 0000 to 9999 lower 4 digits CHAN 2 Stroke counter 0000 to 9...

Страница 51: ...SENT Next come high LEDs 4 lo LEDs 4 Chan 0 4 Chan 1 4 etc as before The above assumes data without spaces was requested command 27 HEX If data with spaces is requested command 22 HEX then a space fo...

Страница 52: ...roper zone or a fill relay operation If the N269 is in set up mode the alarms will not shut down the press Also if that particular channel is bypassed in the setpoint which caused the alarm the meter...

Страница 53: ...I O STATUS Total of 4 digits each digit represents 4 bits First two digits represent status of inputs Next two digits represent status of outputs 1 device OFF 0 device ON ALL OTHER NUMBERS ARE 0000 99...

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