The Gemini 5200 is another unit in a multi-purpose series of industrial
control products that are field-programmable to solve multiple applications.
This series, known as the Astro-Line family of products, is built around the
concept that the end user has the capability to program different
personalities and functions into the unit in order to adapt to different
indication and control requirements.
The Gemini 5200, which you have purchased, has the same high quality
workmanship and advanced technological capabilities that have made Red
Lion Controls the leader in today's industrial market.
Red Lion Controls has a complete line of industrial indication and control
equipment, and we look forward to being of service to you now and in the
future.
III. PROGRAMMING THE A/B, (A-B)/B, & A-B DISPLAY C MODES
A) Basic Operation
B) Codes 41, 42, 43, 45, & 46
C) Codes 51, 52, 53, 54, & 55
D) Codes 61, 62, 63, 64, 65, 66, Preset Values, & Scale FactorsA&B
E) Gemini 5200 Programming Example - Speed Ratio Application
IV. GEMINI 5200 20 MA CURRENT LOOP COMMUNICATIONS
A) Communication Format
B) Sending Commands & Data To The Gemini 5200
C) Receiving Data From The Gemini 5200
D) Print Options
E) Current Loop Installation
F) Communications Application
G) Troubleshooting Gemini Serial Communications & Serial Loop-Back Self-Test
V. APPENDIX “A” - INSTALLATION & INPUT CONFIGURATION SWITCH SET-UP
VI. APPENDIX “B” - SPECIFICATIONS & DIMENSIONS
VII. APPENDIX “C” - TROUBLESHOOTING GUIDE
VIII. APPENDIX “D” - DUAL RATE W/O DISP C FUNCTION COMMAND CODE SUMMARY
IX. APPENDIX “E” - GEMINI 5200 DUAL RATE W/DISP C FUNCTION COMMAND CODE SUMMARY
X. APPENDIX “F” - SCALING FOR RATE & DISPLAY C
XI. APPENDIX “G” - GEMINI 5200 PROGRAMMING CHARTS
XII. APPENDIX “H” - ORDERING INFORMATION
The Gemini 5200 is a multi-function dual rate indicator which can fulfill
almost any rate indication application. The unit can operate as two independent
rate indicators, with scaling, decimal point placement, and update times,
separatelyprogrammableforeachchannel. The Gemini5200 also hasthree other
unit personalities. These modes feature a third display channel, C, which can
indicate the ratio, difference or draw between the A and B rate channels.
The programming of the rate channels and the calculated display is very
straightforward. Setting up Channel C only requires programming the desired
amount of resolution (for ratio and draw) and the appropriate decimal point
location. The Gemini 5200 simply takes the two rate values and mathematically
calculates display C accordingly.
The Gemini 5200 20 mA Current Loop Communications option provides the
capability of two-way serial communications between the Gemini 5200 and a
variety of equipment, such as a printer, remote terminal, programmable
controller, or host computer. The baud rate can be set to 300, 600, 1200, or 2400
baud. The format for transmitted and received data is 1 start bit, 7 data bits, 1
paritybit (odd), and a stopbit. When utilizing anexternalpower supply (30 VDC
max.), up to sixteen units can be installed in the loop, each with an individual
address.When utilizing theGemini’s 20 mAcurrent source,upto sevenunitscan
be installed in a loop. The Rate Values, Presets, and Scale Factor can be
interrogated or changed by sending the proper command codes and numerical
data (if required) to the unit. Various “Print Options” can be selected to
automatically interrogate the Rate Values, Presets, and Scale Factor by
activating the “Print Request” terminal or by sending a “Transmit Per Print
Option” (P) command.
The construction of the Gemini 5200 features a metal die-cast bezel, offering
maximum durability with a high quality die-cast appearance. The sealed front
panel meets NEMA 4/IP65 specifications for washdown and/or dust when
properly installed. Clamp type pressure plate terminals accept stripped #14
AWG wire without lugs.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the
manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Donot use this unit to directlycommand motors, valves, or otheractuators not
equipped with safeguards. To do so, can be potentially harmful to persons or
equipment in the event of a fault to the unit.
PROGRAMMING THE GEMINI 5200
When your Gemini 5200 arrives from the factory, it has already been
programmed to function as a Dual Rate Indicator without the calculated C
display. It is programmed with the factory settings listed in the “Factory
Settings” section. If it is required to have the unit operate as a speed ratio, speed
difference or draw indicator, the Unit Personality function code can be changed
to do so.
The personality, functions, and modes are accessed by pressing the
appropriate keys as indicated by the embossed numbers above them. A function
is defined by a two-digit code which appears on the left side of the display. The
modeof that function isshown as a one-digitcodeon the rightsideof the display.
At times there will be a “-” sign modifier to the left of the mode.
Data for the Presets, Scale Factors and Timed Output Values are entered
differently. Each digit key controls the digit on the display directly above it.
Changing the digits can be done by repeatedly pressing the key beneath the digit
position you wish to change or by holding the key down. As you hold it down, or
repetitively press it, the value of that digit will change cyclically, counting up to
9, then to0,andthen up again. The 6 numbered keys correspond to the six digits,
and the “+/-” key corresponds to polarity.
PROGRAMMING THE PERSONALITY
Entering function and mode is easily accomplished by
pressing the appropriate digit key. For the personality
function, you would enter 41 by pressing the front panel
keys, 4 and 1.
Thedigits on the left side ofthe display show the function
code; the digits on the right side show the current
programmed mode.
Anewmode selection is made by entering a new number.
On some of the entries, you have the option of a plus “+” or
minus “-” sign. In the cases where a “+” sign is required, no
sign will be displayed. If you do enter a “-” sign (using the
“+/-” key), a minus sign will be displayed in front of the
appropriate digit.
Pressing the “E” key finalizes the change. The display
If you do not press the “E” key, the change will not be
recorded.The display will remain inthe programming mode
for 15 seconds, and then return to normal operating mode
using the old function and mode settings.
Whenever the Unit Personality is changed, the factory settings will
automatically be loaded into the unit. The factory settings can also be
programmedinto the unit by callingup the Unit Personality, puttinga “-” in front
of the mode by pushing the “+/-” key, and entering it.
Refer to the “Initial Factory Configuration” section for more details.
PROGRAMMING THE PRESETS, SCALE FACTORS &
TIMED OUTPUT VALUES
The Presets and Scale Factor Values are commonly reprogrammed on a daily
basis. As such, single keystroke access has been provided on the front panel.
The Gemini 5200 has two Scale Factors, one for Rate
DisplayA, and one for Rate DisplayB. Pressing the “3” key
will call up the Scale Factor for the current rate value being
displayed (Rate A or Rate B).
To call up the “other” Scale Factor, the “+/-” key is first pushed to change the
display to the “other” value (Rate A or Rate B), then the “3” key is pushed to
display the Scale Factor for that value.
To display the Preset 1 Value, the “1” key is pushed.
To change the value, the digits can be cycled through in
the same manner as discussed for the Scale Factors. The
Preset Values can range from -999999 to +999999.
The Timed Output Values are changed by entering
two-digit function codes. After the code is entered, the
display will show the present Timed Output 1 or 2 Value in
seconds with two decimal place resolution. The Timed
Output Values can be set from .01 to 599.99 seconds.
Once the Scale Factor is displayed, changing the digits
canbeaccomplished by repeatedly pressing the key beneath
the digit position you wish to change or by holding the key
down, allowing the digit to cycle.
Tochange the Timed Output 1 Value,enterfunction code
53 and enter the new value by holding down or repeatedly
pressingthe keybelow thedigitposition youwish tochange.
Thenew value will be enteredwhen the “E” key ispressed.
The display will immediately return to the rate value.
Note: A Timed Output Value of zero cannot be programmed into the Gemini
5200. Ifa value of 0 is entered into the display,and the “E” key is pressed, the
unit will remain in data entry mode. If a new value is not entered, it will time
out and the unit will continue to use its previous setting.
As with the other functions, you must press “E” to record the changes. For the
data entry modes, if you do not press the “E” key, a time out of 5 seconds occurs,
and the display returns to operating mode without any changes to the value. The
only time any change will occur is when the “E” key is pressed.
4,141 1Personality selected as DUAL RATE W/O DISP C
4,242 3Reset RateA&Boutputs
4,343 1Rate B Conversion Factor is Rate Per Second (x1)
4,444 1Rate B Minimum Update time of 0.5 Sec.
4,545 4Rate B Scale Multiplier of 1.0
4,646 1Rate B leading zero blanking and no decimal point
5,151 1Output 1 assigned to Rate A, Output 2 to Rate B
5,252 3Output 1 terminates at Reset, Normal Phase
5,30000.10Timed Output 1 value of 0.1 Sec.
5,454 3Output 2 terminates at Reset, Normal Phase
5,50000.10Timed Output 2 value of 0.1 Sec.
5,656 4No Rate B right hand dummy zeros
6,161 4No Rate A right hand dummy zeros
6,262 1Rate A Conversion Factor is Rate per Second (x1)
6,363 1Rate A Minimum Update Time of 0.5 Sec.
6,464 4Rate A Scale Multiplier of 1
6,565 1Rate A leading zero blanking, no decimal point
6,666 1No functions except Reset enabled
301.0000Scale Factor A (Rate A) set to 1.0000
301.0000Scale Factor B (Rate B) set to 1.0000
1000500Preset 1 set to 500
2001000Preset 2 set to 1000
DUAL RATE WITH SPEED RATIO FACTORY SETTINGS *
Keys StruckDisplayDescription
4,141 2Personality selected as DUAL RATE W/SPEED RATIO
4,242 3Reset RateA&Boutputs
4,343 1Rate B Conversion Factor is Rate Per Second (x1)
4,545 4Rate B Scale Multiplier of 1.0
4,646 1Display C leading zero blanking and no decimal point
5,151 1Output 1 assigned to Rate A, Output 2 to Rate B
5,252 3Output 1 terminates at Reset, Normal Phase
5,30000.10Timed Output 1 value of 0.1 Sec.
5,454 3Output 2 terminates at Reset, Normal Phase
5,50000.10Timed Output 2 value of 0.1 Sec.
6,161 1Display C Multiplier of 1
6,262 1Rate A Conversion Factor is Rate per Second (x1)
6,363 1Rate Minimum Update Time of 0.5 Sec.
6,464 4Rate A Scale Multiplier of 1
6,565 1RateA&Bleading zero blanking, no decimal point
6,666 1No functions except Reset enabled
301.0000Scale Factor A (Rate A) set to 1.0000
301.0000Scale Factor B (Rate B) set to 1.0000
1000500Preset 1 set to 500
2001000Preset 2 set to 1000
* If function Code 41 is changed to [41 2], then the factory settings are as shown.
4,141 3Personality selected as DUAL RATE W/SPEED DIFF.
4,242 3Reset RateA&Boutputs
4,343 1Rate B Conversion Factor is Rate Per Second (x1)
4,545 4Rate B Scale Multiplier of 1.0
4,646 1Display C leading zero blanking and no decimal point
5,151 1Output 1 assigned to Rate A, Output 2 to Rate B
5,252 3Output 1 terminates at Reset, Normal Phase
5,30000.10Timed Output 1 value of 0.1 Sec.
5,454 3Output 2 terminates at Reset, Normal Phase
5,50000.10Timed Output 2 value of 0.1 Sec.
6,262 1Rate A Conversion Factor is Rate per Second (x1)
6,363 1Rate Minimum Update Time of 0.5 Sec.
6,464 4Rate A Scale Multiplier of 1
6,565 1RateA&Bleading zero blanking, no decimal point
6,666 1No functions except Reset enabled
301.0000Scale Factor A (Rate A) set to 1.0000
301.0000Scale Factor B (Rate B) set to 1.0000
1000500Preset 1 set to 500
2001000Preset 2 set to 1000
* If [41 1] is changed to [41 2], then the factory settings are as shown.
DUAL RATE WITH SPEED DRAW FACTORY SETTINGS *
Keys StruckDisplayDescription
4,141 4Personality selected as DUAL RATE W/SPEED DRAW
4,242 3Reset RateA&Boutputs
4,343 1Rate B Conversion Factor is Rate Per Second (x1)
4,545 4Rate B Scale Multiplier of 1.0
4,646 1Display C leading zero blanking and no decimal point
5,151 1Output 1 assigned to Rate A, Output 2 to Rate B
5,252 3Output 1 terminates at Reset, Normal Phase
5,30000.10Timed Output 1 value of 0.1 Sec.
5,454 3Output 2 terminates at Reset, Normal Phase
5,50000.10Timed Output 2 value of 0.1 Sec.
6,161 1Display C Multiplier of 1
6,262 1Rate A Conversion Factor is Rate per Second (x1)
6,363 1Rate Minimum Update Time of 0.5 Sec.
6,464 4Rate A Scale Multiplier of 1
6,565 1RateA&Bleading zero blanking, no decimal point
6,666 1No functions except Reset enabled
301.0000Scale Factor A (Rate A) set to 1.0000
301.0000Scale Factor B (Rate B) set to 1.0000
1000500Preset 1 set to 500
2001000Preset 2 set to 1000
* If [41 1] is changed to [41 2], then the factory settings are as shown.
One of the important features of the Gemini 5200 is the ability to disable
programming. With this ability, accidental bumping of the keys or tampering by
unauthorizedpersonnel can be prevented. However,it may be necessary toallow
reset and certain programming functions, such as Presets and Scale Factor
Values,to bechanged in dailyoperation. TheGemini 5200, throughthe useofthe
“Operator Accessible Functions” modes, can enable these functions even when
the “PGM. DIS.” terminal is connected to “COMMON”.
The “Operator Accessible Functions” modes are programmed by entering a
two-digit function code (66) and the desired mode. Unlike other function codes,
the mode does not take effect immediately. The “PGM. DIS.” terminal must be
connected to “COMMON” in order for the Gemini to disable programming and
operate as per the mode programmed.
Thereare four basic “OperatorAccessible Functions” Modes available.These
modes enable the following functions.
1. NO FUNCTIONS EXCEPT RESET ENABLED - In this mode, manual
reset is enabled, but none of the programming functions can be changed.
However, the functions can be interrogated.
2. PRESET PROGRAMMING AND RESET ENABLED - The entire front
panel is disabled with the exceptions of Preset programmability and manual
reset. All functions can be interrogated.
3. SCALE FACTOR PROGRAMMING AND RESET ENABLED - The
entire front panel is disabled with the exceptions of Scale Factor
programmability and manual reset. All functions can be interrogated.
4. SCALE FACTOR AND PRESET PROGRAMMING, AND RESET
ENABLED - The entire front panel is disabled with the exceptions of Scale
Factor and Preset programmability, and manual reset. All functions can be
interrogated.
All of these modes can be modified with the addition of a “-” sign. The minus
sign disables the manual reset, at the front panel and the remote reset (RST., not
RST.A) terminal, at the rear of the unit.
There is also a rear panel DIP switch which permits disabling of the front panel
resetbutton.This is independent of the rear terminalremotereset, and can be used in
conjunction with any front panel disable mode. The combination of a manual and
remote reset inputs provides a high level of security without sacrificing flexibility.
DIAGNOSTICS, SELF-TEST, & “WATCHDOG” TIMER
The security of the Gemini 5200 is further enhanced by its self-test diagnostic
and “watchdog” timer capabilities.
The diagnostics are concerned with the special, no power memory of the
Gemini 5200. Whenever the power is turned off, all pertinent function settings
and measurements are automatically saved. When power is restored, the
functions and data are re-instated. This allows you to program the unit once and
not have to re-program it until you wish to use it in another mode.
When the function codes and data are saved, computations are made with
thesevalues. The result of these computations isstored in the memory to serveas
a checkagainstpossible error. On power up, the same computations are repeated
on the stored data. If the results do not agree with the stored results, a “P” will
appear ontheleft side of the display. If this occurs, refer to the “Troubleshooting
Guide” for directions.
The Gemini 5200 also contains a “watchdog” timer. In order to insure the
software is functioning properly, the program constantly monitors itself. If the
proper sequence and timing of internal events does not occur, an “E” will appear
onthe left side ofthedisplay. If this occurs,refer to the “TroubleshootingGuide”
for directions.
The final type of built-in check, is the front panel initiated self-test. It can be
performed at any time, even when the Gemini 5200 is running. It will not
interferewith the accumulationof counts orcontrol functions. Afunction codeof
“6”, “+/-” starts the test. At this time, whatever was displayed will disappear and
be replaced by a string of decimal points and the overflow indicator. Then the
display willshow a string of 9’s, then 8’s etc., until astringof 0’s are shown. The
self-test will then turn off the overflow indicator and activate the minus “-” sign.
Then the unit shows an interlace pattern of -010101, then -212121, followed by
-232323 etc., until -898989 is reached. At this time the outputs can be tested by
pressing the “1” or “2” key. (The program disable pin must be disconnected in
order to allow activation of the outputs.) An automatic exit will take place after
six seconds or immediately if the Program Disable terminal is connected to
common.Normal length of display time foreach of the patterns isapproximately
0.5 sec. Rapidly pressing “E” during self-test can speed up the sequence.
There are two independent input channels on the Gemini 5200. Various types
ofsensoroutputs can be accommodated by appropriate DIP switchset-up. These
include: TTL or CMOS logic, current sinking, current sourcing, dry contact or
magnetic pickup.
Both Input Channels A and B consist of a logic input and a separate low level
magnetic pickup input. For a complete detailed description of input set-up, see
Appendix “A”.
OVERFLOW INDICATION
TheGemini 5200 featuresan overflow indicator(LED) whichislocated tothe left
of the sixth digit and above the polarity annunciator. This LED will turn on if the
capacity of the display (6-digits) is exceeded or if the following conditions occur.
Uponpower-up, thedisplay will goto zero,and the overflowLED willturn on.
The overflow LED is turned on to indicate that the zero on the display is not a
measured value. The overflow LED will turn off after the Gemini 5200
completes its rate measurement. It will take 16 seconds if the rate is zero.
The overflow LED canalsoturnon when the rate input frequency exceeds the
maximum 3250 cps allowed for a rate update period of 16 sec. See Code 63 “Rate Minimum Update Time”.
PROGRAMMING THE GEMINI 5200 IN DUAL RATEWITHOUT DISPLA YC MODE
The rate indicators use a time interval method (1/tau) to calculate the rate
value. This method enables high resolution at all input rates. The unit counts
input pulses and after a programmable minimum update time has occurred, it
waits until the next count edge occurs, takes the elapsed time and number of
edges, and calculates the rate value. At slower rates, averaging can be
accomplishedby programming the“Minimum Update Time”(0.5 sec. to16 sec.)
for the desired response. Extensive scaling capabilities allow practically any
desired reading at very slow count rates.
Inthe Dual Rate,without Display Cmode,the two rateindicators operate inan
independent non-synchronized fashion. Input A serves as the input to the Rate A
indicator and Input B serves as the input to the Rate B indicator. All modes are
independently selected for each rate channel.
CODE 41 - UNIT PERSONALITY
The unit personality mode is the first function code that is programmed. This
mode will determine the basic operational characteristics of the unit. This
programming section deals with the unit programmed as a Dual Rate Indicator
without Display C, mode 1. The “Programming The A/B, (A-B)/B, And A-B
DisplayC Modes” sectioncoversprogramming of theGemini 5200 when inUnit
Personality modes 2, 3, and 4.
Once the Unit Personality mode is changed, the factory settings will
automatically be loaded into the unit’s memory. This provides a known starting
place. If at any point, it is desired to return to the factory settings for the current
mode, the unit personality is called up, a minus is put in front of the mode by
pressingthe“+/-” key, and the “E” key is pushedtoload the factory settings. The
factory settings are listed on page 5 and 6.
[41 1] DUAL RATE INDICATION - In this mode, the Gemini 5200 operates as
two independent rate indicators.
[41 2] DUAL RATE WITH A/B DISPLAYC-Inthis unit personality, the
Gemini 5200 operates as a dual rate indicator with an A/B display C function.
[41 3] DUAL RATE WITH A-B DISPLAYC-Inthis unit personality, the
Gemini 5200 operates as a dual rate indicator with an (A-B) Display C
function. See “Programming The A/B, (A-B)/B, And A-B Display C Modes”
section for programming details.
[41 4] DUAL RATE WITH (A-B)/B DISPLAYC-Inthis unit personality, the
Gemini 5200 operates as a dual rate indicator with an (A-B)/B Display C
function. See “Programming The A/B, (A-B)/B, And A-B Display C Modes”
section for programming details.
[41 -1]
[41 -2]A minus indicator preceding the mode will cause
[41 -3]the factory settings to be loaded when entered.
[41 -4]
CODE 42 - RESET KEY & TERMINAL ACTUATION MODES
The Reset Button & Terminal Actuation Modes controls the effect that the
reset button and terminal have on the two display channels. Resetting will not
affect the rate displays or update period in any manner. Reset only affects the
output(s) associated with the rate channels.
There is a separate “Rst A” terminal provided which makes it possible to
independently reset both the Rate A and B Outputs.
[42 1] RESET RATE A OUTPUT(S)
[42 2] RESET RATE B OUTPUT(S)
[42 3] RESET RATEA&BOUTPUTS
CODE 43 - RATE B CONVERSION FACTOR
The Rate B Conversion Factor is used to convert Display B to indicate rate in
the desired time unit. See Appendix “F” - Scaling For Rate And Display C.
[43 1] Rate Per Second (x1)
[43 2] Rate Per Minute (x60)
[43 3] Rate Per Hour (x3600)
The determinationofthe rate value uses a method in which the elapsed time is
measured between the first and last pulse of the update period. The minimum
updatetime is the shortestthe time periodcan be. Once theminimum update time
has expired, the unit will end the measurement period when the next negative
goingcount edge occurs. If theunit does not receive thenextnegative count edge
within the maximum update time at the start of the measurement period, the unit
will end the time period and the rate display will go to zero. At very slow count
rates the update time period will be the actual period of one count cycle.
[44 1] 0.5 Sec. minimum/1 Sec. maximum
[44 2] 1 Sec. minimum/2 Secs. maximum
[44 3] 2 Secs. minimum/4 Secs. maximum
[44 4] 4 Secs. minimum/8 Secs. maximum
[44 5] 8 Secs. minimum/16 Secs. maximum (max. rate = 7500 cps)
[44 6] 16 Secs. minimum/32 Secs. maximum (max. rate = 3250 cps)
CODE 45 - RATE B SCALE MULTIPLIER
The Rate B Scale Multiplier is used in conjunction with the Rate Scale Factor
B and Rate B Conversion Factor to scale the actual signal input to obtain the
desired reading.
[45 1] x 1000
[45 2] x 100
[45 3] x10
[45 4] x1
[45 5] x 0.1
[45 6] x 0.01
CODE 46 - RATE B DECIMAL POINT & LEADING ZERO
BLANKING
There are six basic modes of decimal point placement for the Rate B indicator
of the Gemini 5200. The decimal point is placed to the right of the display digit
that corresponds to the mode identifier. (The right most decimal point, digit 1, is
never turned on.) A “-” sign in front of the mode identifier will inhibit leading
zero blanking. The absence of a “-” sign will enable leading zero blanking.
The outputs oftheGemini5200 can be assigned to either the Rate A or Rate B
channel or one to each.
The Gemini 5200 has a Preset tracking feature which allows Preset 1 to track
Preset2. If Preset trackingis programmed, whenever thePreset 2 valueischanged,
the Preset 1 value will also change to maintain the same offset. For example, if
Preset 1 is 100 and Preset 2 is 200, changing Preset 2 to 300 will automatically
changePreset 1 to 200,maintaining the same 100unit offset. In orderto change the
amount of offset, the Preset 1 value is changed. The Preset tracking feature is
programmed by adding a “-” modifier in front of the desired mode.
Note: When Preset tracking is enabled, before changing Preset 2 via serial
communications, the Preset 2 value must be interrogated in order to establish
the Preset 1 value.
[51 1] Output 1 assigned to Rate A, Output 2 assigned to Rate B
[51 2] Outputs1&2assigned to Rate B
[51 3] Outputs1&2assigned to Rate A
[51 -1]
[51 -2]
[51 -3]
These modes are the same as above with the exception
that Preset Tracking is enabled.
The Gemini 5200 has four “Output 1 termination Modes” which control the
way Output 1 will terminate or reset. In all modes, Output 1 will terminate
immediately when the channel to which it is assigned is manually reset.
A reverse phase mode is available on the Gemini 5200. This refers to the
complementing of the logic state of Output 1. With normal phase operation,
when the display value reaches Preset 1, Output 1 will turn on. The reset
conditionofOutput 1 is output off. In reverse phase operation, Output1 turns off
whenPreset 1 is reached.The reset condition ofOutput 1 is outputon. (Note: The
state of the relay, if used, is also reversed.) A “-” sign in front of the mode
identifier will provide for reversephaseoperation.The absence of a “-” sign will
indicate normal phase operation.
[52 3] TERMINATEAT MANUAL RESET- Output 1activates when therate is
greater than or equal to the Preset 1 value. In this mode, once Output 1 is
activated, it does not deactivate until the moment a manual reset occurs.
Output 1 is set for normal phase operation.
[52 4] TERMINATE AT MANUAL RESET END - This mode is like the
preceding, except Output 1 deactivates when reset ends. Output 1 is set for
normal phase operation.
[52 5] TERMINATE AFTER TIMED OUTPUT1-Ifboth outputs are assigned to
the same rate channel [51 2,3], Output 1 will activate when the rate is below or
equalto the Preset 1 value. Ifeach output is assigned to adifferent channel [51 1],
Output 1 will terminate after the “Timed Output 1 Value” if the timed output
value islessthan the update time of the rate channel. If the timed output value is
greaterthan theupdate time, theoutput willappearto belatched on, deactivating
whentherate drops below the Preset [51 1],or above the Preset [51 2,3]andthe
output time expires. Output 1 is set for normal phase operation.
[52 6]BOUNDARYMODE - When in boundary mode, the Preset 1 Value serves
as the boundary point. When the rate value is less than Preset 1, Output 1 is not
activated (normal phase). When the rate value is greater than or equal to the
Preset, Output 1 is activated. If the display value were to drop below Preset 1,
Output 1 would then deactivate. Output 1 is set for normal phase operation.
[52 -3]
[52 -4]These modes are the same as above with the exception
[52 -5]that Output 1 is set for reverse phase operation.
[52 -6]
CODE 53 - TIMED OUTPUT 1 VALUE
The Gemini 5200 has the capability of varying the Timed Output 1 value from
0.01 second to 599.99 seconds. When the code is entered, instead of a single mode
identifier digit beingdisplayed,sixdigits will be shown. Refer to the “Programming
The Presets, Scale Factors, And Timed Output Values” section for more details
about entering. The timed output will be terminated if the unit is manually reset.
The Timed Output 1 Value is used only when in timed output termination
mode, [52 5].
Note: A Timed Output Value of zero cannot be programmed into the Gemini 5200.
If avalue of 0 is entered into thedisplay and the “E” key is pressed, the unitwill
not enterthe 0,but willstay in the data entry mode. If a new value is not entered,
it will time out and the unit will continue to use its previous setting.
CODE 54 - OUTPUT 2 TERMINATION MODES
The Gemini 5200 has four “Output 2 termination Modes” which control the
way Output 2 will terminate or reset. In all modes Output 2 will terminate
immediately when the channel to which it is assigned is manually reset.
A reverse phase mode is available on the Gemini 5200. This refers to the
complementing of the logic state of Output 2. With normal phase operation,
when the display value reaches Preset 2, Output 2 will turn on. The reset
conditionofOutput 2 is output off. In reverse phase operation, Output2 turns off
when Preset 2 is reached.
Thereset conditionof Output2is outputon. (Note:The state ofthe relay,if used,
is also reversed.) A “-” sign in front of the mode identifier will provide for reverse
phase operation. The absence of a “-” sign will indicate normal phase operation.
[543] TERMINATE AT MANUAL RESET- Output 2 activates whenthe rate is
greater than or equal to the Preset 2 value. In this mode, once Output 2 is
activated, it does not deactivate until the moment a manual reset occurs.
Output 2 is set for normal phase operation.
[54 4] TERMINATE AT MANUAL RESET END - This mode is like the
preceding, except Output 2 deactivates when reset ends. Output 2 is set for
normal phase operation.
[54 5] TERMINATE AFTER TIMED OUTPUT 2 - Output 2 will activate when
therate isgreater than orequal tothe Preset2Value andwill terminateafter the
“Timed Output 2Value”expires. This will occur every update time period for
whichthe above conditionis true. Ifthe output durationtime is greaterthan the
update time, Output 2 will appear to be latched on, deactivating when the rate
drops below the Preset and the output time expires. Output 2 is set for normal
phase operation.
asthe boundary point. When theratevalue is less than Preset2, Output 2 is not
activated(normal phase). When therate value is greaterthan or equal toPreset
2, Output 2 is activated. If the display value were to drop below Preset 2,
Output 2 would then deactivate. Output 2 is set for normal phase operation.
[54 -3]
[54 -4]These modes are the same as above with the exception
[54 -5]that Output 2 is set for reverse phase operation.
[54 -6]
CODE 55 - TIMED OUTPUT 2 VALUE
The Gemini 5200 has the capability of varying the timed output from 0.01
second to 599.99 seconds. When the code is entered, instead of a single mode
identifier digitbeingdisplayed, six digits will be shown. Refer to “Programming
The Presets, Scale Factors, And Timed Output Values” section for more details
aboutentering. TimedOutput 2willbe terminatedif theunit is manuallyreset.
The Timed Output 2 Value is used only when in timed output termination
mode, [54 5].
Note: A Timed Output Value of zero cannot be programmed into the Gemini 5200.
If avalue of 0 is entered into thedisplay and the “E” key is pressed, the unitwill
not enterthe 0,but willstay in the data entry mode. If a new value is not entered,
it will time out and the unit will continue to use its previous setting.
CODE 56 - RATE B RIGHT HAND DUMMY ZEROS
Dummyzeros canbe usedtoalleviate displayfluctuations dueto an unstableinput
signal.These zeros effectivelymove significantdigitsto theleft. Therefore, anormal
rate display of 1 could be shown as a 10, 100, or 1000. Using the dummy zeros will
make it necessary to adjust the scaling if they were not considered before.
[56 1] 1 RIGHT HAND DUMMY ZERO
[56 2] 2 RIGHT HAND DUMMY ZEROS
[56 3] 3 RIGHT HAND DUMMY ZEROS
[56 4] NO RIGHT HAND DUMMY ZEROS
CODE 61 - RATE A RIGHT HAND DUMMY ZEROS
Dummyzeros canbe usedtoalleviate displayfluctuations dueto an unstableinput
signal.These zeros effectivelymove significantdigitsto theleft. Therefore, anormal
rate display of 1 could be shown as a 10, 100, or 1000. Using the dummy zeros will
make it necessary to adjust the scaling if they were not considered before.
[61 1] 1 RIGHT HAND DUMMY ZERO
[61 2] 2 RIGHT HAND DUMMY ZEROS
[61 3] 3 RIGHT HAND DUMMY ZEROS
[61 4] NO RIGHT HAND DUMMY ZEROS
CODE 62 - RATE A CONVERSION FACTOR
The Rate A Conversion Factor is used to convert Display A to indicate rate in
the desired time unit. See Appendix “F” - Scaling For Rate And Display C.
[62 1] Rate Per Second (x1)
[62 2] Rate Per Minute (x60)
[62 3] Rate Per Hour (x3600)
The determinationofthe rate value uses a method in which the elapsed time is
measured between the first and last pulse of the update period. The minimum
updatetime is the shortestthe time periodcan be. Once theminimum update time
has expired, the unit will end the measurement period when the next negative
goingcount edge occurs. If theunit does not receive thenextnegative count edge
within the maximum update time at the start of the measurement period, the unit
will end the time period and the rate display will go to zero. At very slow count
rates, the update time period will be the actual period of one count cycle.
[63 1] 0.5 Sec. minimum/1 Sec. maximum
[63 2] 1 Sec. minimum/2 Secs. maximum
[63 3] 2 Secs. minimum/4 Secs. maximum
[63 4] 4 Secs. minimum/8 Secs. maximum
[63 5] 8 Secs. minimum/16 Secs. maximum (max. rate = 7500 cps)
[63 6] 16 Secs. minimum/32 Secs. maximum (max. rate = 3250 cps)
CODE 64 - RATE A SCALE MULTIPLIER
The Rate A Scale Multiplier is used in conjunction with the Rate Scale Factor
A and Rate A Conversion Factor to scale the actual signal input to obtain the
desired reading.
[64 1] x 1000
[64 2] x 100
[64 3] x10
[64 4] x1
[64 5] x 0.1
[64 6] x 0.01
CODE 65 - RATE A DECIMAL POINT & LEADING ZERO
BLANKING
There are sixbasicmodesof decimal point placement for the Rate A indicator
of the Gemini 5200. The decimal point is placed to the right of the display digit
that corresponds to the mode identifier. (The right most decimal point, digit 1, is
never turned on.) A “-” sign in front of the mode identifier will inhibit leading
zero blanking. The absence of a “-” sign will enable leading zero blanking.
The Gemini 5200 has four basic levels of “Operator Accessible Functions”.
Each of these levels canbemodifiedto enable or disable manual reset. When the
“PGM. DIS.” (program disable) terminal is connected to “COMMON”, access
to all functions is disabled except for those listed below which will remain
enabled.All of the function codes andparameterscan be interrogated, regardless
of the “Operator Accessible Functions” mode selected.
A “-” sign in front of the mode identifier will disable the front panel Reset
button and the “RST.” terminal.
Note: The front panel reset button can be independently disabled by using the
disable reset DIP switch.
[66 1] NO FUNCTIONS ENABLED EXCEPT RESET - In this mode, manual
reset is enabled, but none of the programming functions can be changed.
[66 2] PRESET PROGRAMMING AND RESET ENABLED - In this mode,
manual reset and the programming of the Preset Values are enabled.
[66 3] SCALE FACTOR PROGRAMMING AND RESET ENABLED - In this
mode, manual reset and the programming of the Scale Factors are enabled.
[66 4] SCALE FACTOR, PRESET PROGRAMMING & RESET ENABLED -
Inthis mode, manualresetand the programmingof the Scale Factorand Preset
[66 -1]
[66 -2]These Modes are the same as above with the
[66 -3]exception that manual reset is disabled.
[66 -4]
PRESET VALUES
Whenever the display value equals the Preset 1 or 2 Value, an output action
will occur. This action depends on the previously programmed modes. The
Preset Values may vary from -999,999 to 999,999. Refer to “Programming The
Presets, Scale Factors, And Timed Output Values” section for instructions on
entering the Preset Values.
“1” - PRESET 1 VALUE
“2” - PRESET 2 VALUE
SCALE FACTORSA&B
“3” SCALE FACTOR - The Scale Factor, for whichever Value (Rate A or B)
is currently being displayed, is accessed by pressing the “3” key. To access the
Scale Factor of the “other” rate display value, the “+/-” key would be pushed (to
change the display to the other value), then the “3” key would be pushed. The
actual rate (in pps) is multiplied by the Scale Factor, Scale Multiplier, and Rate
Conversion factor to obtain the desired display reading. The Scale Factor is used
primarily for conversion from existing pulses per unit of measure to the required
displayedunits. Thisincludes conversion fromdifferent units ofmeasure (i.efeet
tometers, etc.). The ScaleFactor Values may rangefrom 0.0001 to 5.9999.Refer
to“Programming The Presets, ScaleFactors, And Timed OutputValues” section
for instructions on entering the Scale Factor Values.
PROGRAMMING THE A/B, (A-B)/B, AND A-B DISPLAYC MODES
Thissection will dealwith the programmingand operation oftheGemini 5200
inthe modes whichinclude Display C,[41 2,3,4]. Sinceall three displayC modes
are very similar in operation, they will all be covered in one section.
BASIC OPERATION
In all of the display C modes, the Gemini 5200 performs a mathematical
calculation using Rate channelsA&Btoobtain the Display C value.
The tworate indicators, use a time interval method (1/tau) to calculate the rate
value. This method enables high resolution at all input rates. The unit counts
input pulses and after a programmable minimum update time has occurred, it
waits until the next count edge occurs, takes the elapsed time and number of
edges, and calculates the rate value. At slower rates, averaging can be
accomplishedby programming the“Minimum Update Time”(0.5 sec. to16 sec.)
for the desired response.
Whenoperating in any of the three modeswhich utilize display C, the tworate
indicators will synchronize themselves in order to obtain an accurate display C
reading. The Gemini5200willdetermine which channel is running at the slower
rate, anditwill use that channel to synchronize the other channel. This is done so
that both time measurement windows are as close as possible. Because it is
necessary to keep the measurement windows the same, there is only one Rate
Minimum Update Time setting. The slower channel will determine the update
time for the other rate channel and Display C.
If one rate input signal drops out before the update period has completed, that
channel will go to zero after the maximum update time has expired. The channel
will then continually time-out according to the maximum update time that was
selected in Code 63, until a rate signal again appears on its input. After the first
time-out, the other channel, which still has a rate signal on its input, will then
begin to operate in a non-synchronous manner, updating according to the
“Minimum Update Time” and its input frequency. It will not synchronize with
the channel that timed-out, and has an update period of 16 seconds.
The Display C channel, however, will only update according to the
maximum update time because it is calculated based on both of the rate
channels. The rate channels will again synchronize when both channels have a
rate signal on their inputs.
CODE 41 - UNIT PERSONALITY
The unit personality mode is the first function code that is programmed. This
mode will determine the basic operational characteristics of the unit. This
programming section dealswiththe unit personality programmed as a Dual Rate
Indicator with Display C, modes 2, 3, or 4. A separate section, “Programming
The Gemini 5200 In Dual Rate Without Display C Mode” goes over the
programming of the Gemini 5200 when programmed in mode 1.
Whenever the Unit Personality mode is changed, the factory settings will
automatically be loaded into the unit’s memory. This provides a known starting
place. If at any point, it is desired to return to the factory settings for the current
personality,the unitpersonalityis calledup, a minusis putinfront ofthe mode by
pressing the “+/-” key, and the “E” key is pushed to load the factory settings.
[41 1] DUALRATE INDICATION -In this UnitPersonality, theGemini5200
operates as two independent rate indicators. See “Programming The Gemini
5200In DualRate WithoutDisplayC Mode”section forprogramming details.
[41 2] DUAL RATE WITH A/B DISPLAY C - In this unit personality, the
Gemini 5200 operates as a dual rate indicator with an A/B (Speed Ratio)
Display C function.
[41 3] DUAL RATE WITH A-B DISPLAY C - In this unit personality, the
Gemini 5200 operates as a dualrateindicatorwithan A-B (Speed Difference)
Display C function.
[41 4] DUALRATE WITH (A-B)/BDISPLAYC - Inthis unit personality, the
Gemini 5200 operates as a dual rate indicator with an (A-B)/B (Speed Draw)
Display C function.
[41 -1]
[41 -2]A minus indicator preceding the mode will cause
[41 -3]the factory settings to be loaded when entered.
[41 -4]
TheReset Button & Terminal Actuationmodes control the effectthat the reset
button and terminal have on the two display channels. Resetting will not affect
the rate displays in any manner. Reset only affects the output(s) associated with
the rate channels.
There is a separate “Rst A” terminal provided which makes it possible to
independently reset both Rate A and B channels.
[42 1] RESET RATE A OUTPUT(S)
[42 2] RESET RATE B OUTPUT(S)
[42 3] RESET RATEA&BOUTPUT(S)
[42 4] RESET DISPLAY C OUTPUT(S)
[42 5] RESET DISPLAY C AND RATE A OUTPUT(S)
[42 6] RESET DISPLAY C AND RATE B OUTPUT(S)
CODE 43 - RATE B CONVERSION FACTOR
The Rate B Conversion Factor is used to convert Display B to indicate rate in
the desired time unit. See Appendix “F” - Scaling For Rate And Display C.
[43 1] Rate Per Second (x1)
[43 2] Rate Per Minute (x60)
[43 3] Rate Per Hour (x3600)
CODE 45 - RATE B SCALE MULTIPLIER
The Rate B Scale Multiplier is used in conjunction with the Rate Scale Factor
B and Rate B Conversion Factor to scale the actual signal input to obtain the
desired reading.
[45 1] x 1000
[45 2] x 100
[45 3] x10
[45 4] x1
[45 5] x 0.1
[45 6] x 0.01
CODE 46 - DISPLAY C DECIMAL POINT & LEADING ZERO
BLANKING
There are six basic modes of decimal point placement for the Display C
indicatorof the Gemini 5200.The decimal point isplaced to therightof the display
digitthat corresponds to themode identifier. (The rightmost decimal point, digit1,
is never turned on.) A “-” sign in front of the mode identifier will inhibit leading
zero blanking. The absence of a “-” sign will enable leading zero blanking.
The outputs of the Gemini 5200 can be assigned to the Rate A, Rate B, or the
Display C channel.
The Gemini 5200 has a Preset tracking feature which allows Preset 1 to track
Preset 2. If Preset tracking is programmed, whenever the Preset 2 value is changed,
thePreset 1 valuewillalso change tomaintain the same offset.For example, ifPreset
1 is 100 and Preset 2 is 200, changing Preset 2 to 300 will automatically change
Preset 1 to 200, maintaining the same 100 unit offset. In order to change the amount
ofoffset, the Preset1 valueis changed. ThePreset tracking featureis programmed by
adding a “-” modifier in front of the desired mode.
Note: When Preset tracking is enabled, before changing Preset 2 via serial
communications, the Preset 2 value must be interrogated in order to establish
the Preset 1 value.
[51 1] Output 1 assigned to Rate A, Output 2 assigned to Rate B
[51 2] Outputs1&2assigned to Rate B
[51 3] Outputs1&2assigned to Rate A
[51 4] Output 1 assigned to Rate B, Output 2 assigned to Display C
[51 5] Output 1 assigned to Rate A, Output 2 assigned to Display C
[51 6] Output1&2assigned to Display C
[51 -1]
[51 -2]
[51 -3]These modes are the same as above with the
[51 -4]exception that Preset Tracking is enabled.
[51 -5]
[51 -6]
CODE 52 - OUTPUT 1 TERMINATION MODES
The Gemini 5200 has four “Output 1 termination Modes” which control the
way Output 1 will terminate or reset. In all modes, Output 1 will terminate
immediately when the channel to which it is assigned is manually reset.
A reverse phase mode is available on the Gemini 5200. This refers to the
complementing of the logic state of Output 1. With normal phase operation,
when the display value reaches Preset 1, Output 1 will turn on. The reset
conditionofOutput 1 is output off. In reverse phase operation, Output1 turns off
whenPreset 1 is reached.The reset condition ofOutput 1 is outputon. (Note: The
state of the relay, if used, is also reversed.) A “-” sign in front of the mode
identifier will provide for reversephaseoperation.The absence of a “-” sign will
indicate normal phase operation.
[52 3] TERMINATE AT MANUAL RESET - Output 1 activates when the rate
ordisplay valueis greater thanor equalto the Preset1 value.In thismode,once
Output 1 is activated, it does not deactivate until the moment a reset occurs.
Output 1 is set for normal phase operation.
[52 4] TERMINATE AT MANUAL RESET END - This mode is like the
preceding, except Output 1 deactivates when reset ends. Output 1 is set for
normal phase operation.
[52 5] TERMINATE AFTER TIMED OUTPUT1-Ifboth outputs are assigned
to the same channel [51 2,3,6], Output 1 will activate when the rate or display
value is below or equal to the Preset 1 value. If each output is assigned to a
different channel [51 1,4,5], Output 1 will activate when the rate or display
value is greater than or equal to the Preset 1 Value.
Output 1 willterminateafterthe “Timed Output 1 Value” if the Timed Output
Value is less than the update time of the rate or display channel. If the Timed
Output 1 Value is greater than the programmed update time, Output 1 will
appear to be latched on, deactivating when the rate or display value drops
below the Preset [51 1,4,5], or above the Preset [51 2,3,6] and the output time
expires. Output 1 is set for normal phase operation.
[52 6] BOUNDARY MODE - When in boundary mode, the Preset 1 Value
servesasthe boundary point. When the rate ordisplayvalue is less than Preset
1, Output 1 is not activated (normal phase). When the rate or display value is
greaterthan orequal to Preset1, Output 1is activated.If the displayvalue were
to drop below Preset 1, Output 1 would then deactivate. Output 1 is set for
normal phase operation.
[52 -3]
[52 -4]These modes are the same as above with the exception
[52 -5]that Output 1 is set for reverse phase operation.
[52 -6]
CODE 53 - TIMED OUTPUT 1 VALUE
The Gemini 5200 has the capability of varying Timed Output 1 from 0.01
second to 599.99 seconds. When the code is entered, instead of a single mode
identifier digitbeingdisplayed, six digits will be shown. Refer to “Programming
Presets, Scale Factors, and Timed Output Values” section for more details about
entering. The timed output will be terminated if the unit is manually reset.
The Timed Output 1 Value is used only when in timed output termination
mode, [52 5].
Note: A Timed Output Value of zero cannot be programmed into the Gemini 5200.
If avalue of 0 is entered into thedisplay and the “E” key is pressed, the unitwill
not enterthe 0,but willstay in the data entry mode. If a new value is not entered,
it will time out and the unit will continue to use its previous setting.
The Gemini 5200 has four “Output 2 termination Modes” which control the
way Output 2 will terminate or reset. In all modes, Output 2 will terminate
immediately when the channel to which it is assigned to is manually reset.
A reverse phase mode is available on the Gemini 5200. This refers to the
complementing of the logic state of Output 2. With normal phase operation,
when the display value reaches Preset 2, Output 2 will turn on. The reset
conditionofOutput 2 is output off. In reverse phase operation, Output2 turns off
whenPreset 2 is reached.The reset condition ofOutput 2 is outputon. (Note: The
state of the relay, if used, is also reversed.) A “-” sign in front of the mode
identifier will provide for reversephaseoperation.The absence of a “-” sign will
indicate normal phase operation.
[543] TERMINATE ATMANUAL RESET -Output 2 activateswhen the rateor
display value is greater than or equal to the Preset 2 value. In this mode, once
Output 2 is activated, it does not deactivate until the moment a reset occurs.
Output 2 is set for normal phase operation.
[54 4] TERMINATE AT MANUAL RESET END - This mode is like the
preceding, except Output 2 deactivates when reset ends. Output 2 is set for
normal phase operation.
[54 5] TERMINATE AFTER TIMED OUTPUT 2 - Output 2 will activate when
the rate or display value is greater than or equal to the Preset 2 Value and will
terminate after the “Timed Output 2 Value” expires. This will occur every
update time period for which the above condition is true. If the Output 2
duration time is greater than the display update time, the output will appear to
belatched on, deactivatingwhenthe rate ordisplay value dropsbelow Preset 2
and the output time expires. Output 2 is set for normal phase operation.
[54 6] BOUNDARY MODE - When in boundary mode, the Preset 2 Value
servesasthe boundary point. When the rate ordisplayvalue is less than Preset
2, Output 2 is not activated (normal phase). When the rate or display value is
greaterthan orequal to Preset2, Output 2is activated.If the displayvalue were
to drop below Preset 2, Output 2 would then deactivate. Output 2 is set for
normal phase operation.
[54 -3]
[54 -4]These modes are the same as above with the exception
[54 -5]that Output 2 is set for reverse phase operation.
[54 -6]
CODE 55 - TIMED OUTPUT 2 VALUE
TheGemini 5200 hasthe capability of varyingthe Timed Output2 Value from
0.01 second to 599.99 seconds. When the code is entered, instead of a single
mode identifier digit being displayed, six digits will be shown. Refer to
“Programming Presets, Scale Factors, and Timed Output Values” section for
more details about entering. Timed Output 2 will be terminated if the unit is
manually reset.
The Timed Output 2 Value is used only when in timed output termination
mode, [54 5].
Note: A Timed Output Value of zero cannot be programmed into the Gemini 5200.
If avalue of 0 is entered into thedisplay and the “E” key is pressed, the unitwill
not enterthe 0,but willstay in the data entry mode. If a new value is not entered,
it will time out and the unit will continue to use its previous setting.
CODE 61 - DISPLAY C MULTIPLIER
The Display C Multiplier is used in the Speed Ratio [41 2] and Draw [41 4]
modes to obtain the desired amount of resolution for Display C. For example; if
DisplayC is indicatingspeed ratio, andboth rates arethe same, theratio wouldbe
1. By using a Display C Multiplier of 10, 100, 1,000 or 10,000, in conjunction
with the proper decimal point, the ratio could be read in tenths, hundredths,
thousandths or ten thousandths respectively.
The Display C Multiplier is not available in the Speed Difference Unit
Personality [41 3].
The Rate A Conversion Factor is used to convert Display A to indicate rate in
the desired time unit. See Appendix “F” - Scaling For Rate And Display C.
[62 1] Rate Per Second (x1)
[62 2] Rate Per Minute (x60)
[62 3] Rate Per Hour (x3600)
[64 1] x 1000
[64 2] x 100
[64 3] x10
[64 4] x1
[64 5] x 0.1
[64 6] x 0.01
CODE 63 - RATE MINIMUM/MAXIMUM UPDATE TIME
The determinationofthe rate value uses a method in which the elapsed time is
measured between the first and last pulse of the update period. In the Display C
modes [41 2,3,4], the rate channels are synchronized. The slower of the two
channels will determine the minimum update time. The minimum update time is
the shortest the time period can be. Once the minimum update time has expired,
the unit will end the measurement period, for the synchronizing channel, when
the next negative going count edge occurs. If the unit does not receive the next
negative count edge within the maximum update time at the start of the
measurementperiod, the unitwill end thetime period andcalculate the ratebased
upon the amount of pulses received during the time period. After the
synchronizing channel ends its measurement period, the other channel will end
its measurement period when it receives the next negative going edge.
[63 1] 0.5 Sec. minimum/1 Sec. maximum
[63 2] 1 Sec. minimum/2 Secs. maximum
[63 3] 2 Secs. minimum/4 Secs. maximum
[63 4] 4 Secs. minimum/8 Secs. maximum
[63 5] 8 Secs. minimum/16 Secs. maximum (max. rate = 7500 cps)
[63 6] 16 Secs. minimum/32 Secs. maximum (max. rate = 3250 cps)
CODE 65 - RATEA&BDECIMAL POINT & LEADING ZERO
BLANKING
There are six basic modes of decimal point placement for the RateA&B
indicators of the Gemini 5200. The decimal point is placed to the right of the
displaydigit thatcorrespondsto themode identifier. (Theright mostdecimalpoint,
digit 1, is never turned on.) A “-” sign in front of the mode identifier will inhibit
leadingzero blanking.The absenceofa “-”sign willenable leading zeroblanking.
The Rate A Scale Multiplier is used in conjunction with the Rate Scale Factor
A and Rate A Conversion Factor to scale the actual signal input to obtain the
desired reading.
The Gemini 5200 has four basic levels of “Operator Accessible Functions”.
Each of these levels canbemodifiedto enable or disable manual reset. When the
“PGM. DIS.” (Program Disable) terminal is connected to “COMMON”, access
to all functions is disabled, except for those listed below, which will remain
enabled.All of the function codes andparameterscan be interrogated, regardless
of the “Operator Accessible Functions” mode selected.
A “-” sign in front of the mode identifier will disable the front panel Reset
button and the “RST.” terminal.
Note: The front panel reset button can be independently disabled by using the
disable reset DIP switch.
[66 1] NO FUNCTIONS ENABLED EXCEPT RESET - In this mode, manual
reset is enabled, but none of the programming functions can be changed.
[66 2] PRESET PROGRAMMING AND RESET ENABLED - In this mode,
manual reset and the programming of the Preset Values are enabled.
[66 3] SCALE FACTOR PROGRAMMING AND RESET ENABLED - In this
mode, manual reset and the programming of the Scale Factor Values are
enabled.
[66 4] SCALE FACTOR, PRESET PROGRAMMING AND RESET
ENABLED - In this mode, manual reset and the programming of the Scale
Factors and Preset Values are enabled.
[66 -1]
[66 -2]These modes are the same as above with the
[66 -3]exception that manual reset is disabled.
[66 -4]
PRESET VALUES
Wheneverthe rate ordisplay value equalsthe Preset Value,an output actionwill
occur. This action depends on the previously programmed modes. The Preset
Value may vary from -999,999 to 999,999. Refer to “Programming the Presets,
Scale Factors, And Timed Output Values” section for entering instructions.
SCALE FACTORSA&B
The Scale Factor, for whichever Value (Rate A or B) is currently being
displayed, is accessed by pressing the “3” key. To access the Scale Factor of the
“other”display value, the“+/-” key wouldbe pushed (tochange the displayto the
othervalue), then the “3” key wouldbe pushed. If the “3”keyis pushed while the
Display C value is on the display, a scale factor will not be displayed, since the
Display C value does not have a scale factor associated with it.
The actual rate (in pps) is multiplied by the appropriate Scale Factor, Scale
Multiplier,and Rate Conversion factor to obtainthe desired display reading. The
Scale Factor is used primarily for conversion from existing pulses per unit of
measure to the required displayed units. This includes conversion from different
unitsof measure (i.e feet tometers, etc.). The ScaleFactorValue may range from
0.0001 to 5.9999. Refer to “ProgrammingthePresets,ScaleFactors,And Timed
Output Values” section for entering instructions.
A paper towel manufacturer needs to maintain a tight control on the speed
relationship of two rollers. Two outputs are needed to signal when the speed
relationship of the rolls are out of the operating “safe zone”. A 72 tooth gear is
mounted oneach of the rolls. Two LMPC’s are used to sense thegearteeth. Each
of the rolls have a circumference of 2 feet.
The Gemini 5200 can fulfill all the requirements of the system. The Gemini
5200 can provide an indication of the speed relationship, and can also provide a
Feet per Minute indication of the speed at which each of the rolls are running.
Thesystem can be set-upso that thespeedrelationship is givenas a speed ratio
or draw. After programming, only the Presets will have to be changed. In this
programming example, Display C will be set-up to indicate speed ratio, A/B.
SCALING THE RATE CHANNELS
Since both of the rolls have the same circumference and have gears with the
same number of teeth, the scaling parameters obtained will apply to both Rate
channelsA&B.
The unit of display for the rate channels will be in feet. From the information
given,72 pulses willbe providedfor2 “DisplayUnits”(feet) oflinear web travel.
Utilizing the formulas and procedure in Appendix “F”, we obtain the Total
Scaling Factor required, “K
To provide maximum conversion accuracy, a Scale Multiplier value of 0.01 is
chosento givethe largestnumberof significantdigits possiblefor the ScaleFactor.
The Rate A & Rate B Scale Factors will be programmed for 2.7778 and the
corresponding Scale Multipliers will be programmed for 0.01.
The final scaling parameter that needs to be selected is the “Rate Conversion
Factors” for both of the Rate channels. To achieve rate in Feet Per Minute, the
“Rate Conversion Factor”, Rate Per Minute is selected.
Scaling Display C is simply a matter of choosing the amount of decimal point
resolution that is desired for the application. This is accomplished by selecting a
Display C Multiplier and by programming the desired “Display C Decimal
Point” location. To obtain Display C resolution in thousandths, a “Display C
Multiplier” of 1000 is used. For example; If both rolls are operating at the same
speed, the ratio would be 1. Selecting a “Display C Multiplier” of 1000 and a
decimalpoint tothe rightofdigit 4,will resultin a DisplayC readoutof 1.000.
HARDWARE SET-UP
The application drawing shows how the hardware for the system is
configured. The Input to both rate channels will be LMPC open collector Logic
Magnetic Pickups. TheA&BInput channels will therefore, be set-up
identically. The dip switch settings for various types of sensors are shown in
Appendix “A”. The “EN/DIS RST.” DIP switch position, is set to the “DIS.”
position to disable the use of the front panel reset button. The solid state open
collectoroutputsof the Gemini, “O1-SNK” and “O2-SNK”, areconnected to the
speed control circuitry of the system.
STEP BY STEP PROGRAMMING PROCEDURE
STEP1-Select function code 41 (Unit Personality). Select and enter mode 2 for
a Dual rate with speed ratio unit personality.
Note: Function code 42, “Reset Button & Terminal Actuation Modes” is not
programmed, since the application doesnot require the resetting ofthe outputs.
STEP 2 - Enter function code 43 (Rate B Conversion Factor). Select and enter
mode 2 for Rate Per Minute.
STEP 3 - Enter function code 45 (Rate B Scale Multiplier). Select and enter
mode 6 for a Scale Multiplier of 0.01, as determined when scaling the rate.
STEP 4 - Enter function code 46 (Display C Decimal Point & Leading Zero
Blanking). Select and enter mode 4 for decimal to the right of digit 4.
STEP 5 - Enter function code 51 (Output Assignment). Select and enter mode 6
to assign both outputs to Display C.
STEP6-Enter function code 52 (Output 1 Termination Mode). Select and enter
mode 6 for boundary operation.
Note: Since Output 1 is not being used in timed output operation, function
code 53, the “Timed Output 1 Value”, is not programmed.
Blanking). Select and enter mode 1 for no decimal point.
STEP 13 - Enter code 66 (Operator Accessible Functions Modes). Select and
enter mode (-)1 for no functions enabled. When the “PGM.DIS.” terminal is
connected to “COMM.”, all programming changes will be inhibited.
STEP14 - The “+/-”key is pushed, ifnecessary, so that RateA is being indicated
on the Gemini 5200. The “3” key is then pushed to call up the Rate A Scale
Factor. The value is changed to 2.7778.
STEP 15 - The “+/-” key is pushed so that Rate B is being indicated on the
Gemini 5200. The “3” key is then pushed to call up the Rate B Scale Factor.
The value is changed to 2.7778.
STEP 16 - Both presets are programmed to the desired ratio limits for within
which the machine is to operate.
After the Gemini 5200 has been programmed, the “PGM. DIS.” terminal is
connected to “COMM.” to prevent any unauthorized or accidental mode
changes. The function codes can, however, be recalled to view or verify that the
proper modes are entered.
The Gemini 5200’s 20 mA Current Loop Communications Option allows a
“two-way” serial communications link to be established in order to monitor the
display values, Presets and Scale Factors from a remote location. Some typical
devices that can be connected with the Gemini 5200 are: a printer, terminal,
programmable controller, or host computer. For devices that use RS232, a
GCM232 Serial Converter Module is available to convert the 20 mA Current
Loop signals to RS232 and vice-versa.
There are two loops that must be established. One for sending commands to
theGemini5200 and one for receiving thedatavalues from the Gemini 5200. Up
to sixteen Geminis or other RLC units with 20 mA serial communication
capability, canbe connected together in the “loop”. These units are assigned unit
addressesby settingtheSerial DipSwitches on eachunit. Theapplicationscan be
as simple as attaching a printer to obtain hard copy of the display information or
as involved as using a host computer to automatically set up Presets and Scale
Factors of a number of Geminis.
1. Interrogation of the rate or display values, Presets, and Scale Factors.
2. Changing of the Presets and Scale Factors.
3. Resetting of the Outputs.
4. Automatic print-out when using a printer and the “Print Request” Terminal.
5. Change viewed display channel
COMMUNICATION FORMAT
Datais sent byswitching off andon thecurrentin the20 mA currentloop. Data
isreceivedby monitoring the switching action and interpretingthecodes that are
transmitted. In order for data to be interpreted correctly, there must be identical
formats and Baud Rates.
The format that the Gemini 5200 will accept is: 1 start bit, 7 data bits, 1 odd
parity bit, and 1 stop bit. The Baud Rates that are available are: 300, 600, 1200,
and 2400.
The selection of the Baud Rate is done by setting DIP switches. Refer to the
“Current Loop Installation” section, for set-up instructions.
FIG. 1: DATA FORMAT-10 BIT FRAME [300, 600, 1200, 2400 Baud]
When sending commands to the Gemini 5200, a command string must be
constructed. The command string may consist of command codes, value
identifiers,and numerical data. Below is alist of commands and value identifiers
that are used when communicating with the Gemini 5200
COMMAND DESCRIPTION
N (4EH)Address command; followed by a unit address number 1-15
and one of the following commands.
P (50H)Transmit per Print Options command.
R (52H)Reset command; operates on Output(s) assigned to
the channel being reset.
T (54H)Transmit Value command; operates on display values,
Presets and Scale Factors.
V (56H)Change Value command; operates on Scale Factors,
and Presets.
D (44H)ChangeDisplaycommand; operateson displayvalues (E -G).
VALUE IDENTIFIERDESCRIPTIONMNEMONIC
A (41H)Preset 1(PS1)
B (42H)Preset 2(PS2)
C (43H)Scale Factor A(SFA)
D (44H)Scale Factor B(SFB)
E (45H)Rate A(CTA)
F (46H)Rate B(CTB)
G (47H)Display C(CTC)
The command string is constructed by using the above commands and value
identifiers, along with the data values that are required. Data values may or may
not contain the decimal point if a decimal point is programmed into the Gemini
5200. The Gemini 5200 will accept the decimal points, however, it does not
interpret theminanyway. Leading zeros can be eliminated, however, all trailing
zeros must be present. For example, if a Scale Factor of 1.0000 is to be sent, the
datavalue can betransmitted as 1.0000or 10000. Ifa “1” istransmitted,the Scale
Factor will be changed to 0.0001.
The Addresscommand is used to allow a command to be directed to aspecific
unit in the Serial Communications Loop. Whenever the unit address is zero,
transmission of the Address command is not required. This is done for
applications which do not require more than one Gemini. For applications that
require several units, it is recommended that each unit in the loop be given a
separate address. If they are given the same address, a command such as the
Transmit Value Command, will cause all the units to respond at the same time,
resulting in erroneous data.
Thecommand string is constructed inaspecific logical sequence. The Gemini
5200willnot accept command strings that do not follow this sequence.Only one
operation can be performed per command string. Below is the procedure to be
used when constructing a command string.
1. If the Gemini 5200, to whichthe command is to be sent,is assigned an address
other than zero, the first two characters of the command string must consist of
the Address Command (N) and the address number of the unit (1-15).
2. The next character/s in the command string is the actual command that the
Gemini 5200 is to perform and the value identifier if it pertains to the
command. (A command such as the Transmit per Print Options, “P”,
command does not require a Value Identifier.)
3. If the change command is being used, the next characters in the command
string is the numerical data value.
4. The last character in the command string is the command terminator (*). This
character must be sent in order to tell the Geminis that the command string is
complete, so that they can begin processing the command.
Below are some typical examples of properly constructed command strings.
(EX. 1) Change Preset 1 on the Gemini 5200 with address of 2 to 00123.4.
COMMAND STRING: N2VA1234
*
(EX. 2) Have the Gemini 5200, with address of 3, transmit the Rate B value.
COMMAND STRING: N3TF
*
(EX. 3) Reset the Rate B outputs of the Gemini 5200 with address of 0.
As shown, all commands must be terminated with a “Command Terminator”
(*or 2AH). The Gemini 5200 will not process the command until the terminator
is sent. If illegal commands or characters are sent to the Gemini 5200, they still
would need to be terminated by an (*). If they are not terminated, the next
command will not be accepted.
When writing application programs in Basic, the transmission of spaces or
carriagereturn and line feedshould be inhibitedbyusing the semicolondelimiter
withthe Printstatement.The Gemini5200 will notaccept a carriagereturn orline
feed as valid characters. See “Terminal Emulation Program” section for a listing
of a terminal emulation program written in Basic.
When a “ChangeValue”commandis sent to the Gemini 5200, a short amount
of time is required for the unit to process the data. This time increases with the
count rate. During this time, only one additional command may be sent to the
Gemini 5200. This may be done 80 msec after the transmission of the “Change
Value” command. After the second command has been transmitted, the unit will
ignore any further commands until 10 msec after both the “Change Value” and
second command have been processed. It is recommended that a “Transmit
Value” command follow a “Change Value” Command. If this is done, the
reception of the data can provide a timing reference for sending another
command and will insure that the change has occurred.
Note: When Preset tracking is enabled, before changing Preset 2 via serial
communications, the Preset 2 value must be interrogated in order to establish
the Preset 1 value.
The timing diagrams show the timing considerations that need to be made.
FIG. 2: TIMING FOR SENDING COMMANDS
(**) This is the time that it takes the Gemini 5200 to process the preset. It
varies with the Count Rate and Scale Factor Value.
Data is transmitted from the Gemini 5200 when a “Transmit Value” or
“Transmit per Print Options” command is sent to the unit, or when the “PRINT
REQ.” terminal is activated. The Gemini 5200 can transmit 7 values: display
channel A, B and C, Presets 1 and 2, and Scale Factors A and B. A list of the
abbreviationsused whenthe Gemini5200transmits thevalues areshown below.
CTA - Rate Display A Value
CTB - Rate Display B Value
CTC - Display C Value
PS1 - Preset 1
PS2 - Preset 2
SFA - Scale Factor A
SFB - Scale Factor B
A typical transmission, with the “PR. ID” (Print ID) switch in the up position,
is shown below.
The first two digits transmitted are the unit address followed by two blank
spaces.If the unit address is 0,the first locations will beleft blank. The next three
letters arethe abbreviation for the mnemonic value followed by one blank space.
The actual values are transmitted last. Negative values are indicated by a “-”
sign. For positive values, the “+” sign is not transmitted. Overflowed display
values are shown by an asterisk preceding the most significant digit of the value.
The decimal point position will “float” within the data field depending on the
actual value it represents.
For peripheral control purposes, a single line transmission will have a <CR>
attached to the end of the above string. For a “T” command or each line of a block
transmission, only the above character string is sent. For the last line of a block
transmission,a <SP><CR> <LF>isattached tothe endof the abovecharacter string.
An example of a typical serial transmission:
3 CTB1234.56 < CR> < LF>
If the “Print Request” terminal initiates the transmission, a 400 msec delay is
inserted before the transmission to keep multiple transmissions from
overrunning the printer.
When thePrintID switch is in the down position, the unit will not transmit the
characters before the data value (address, Value ID, spaces) or the 400 msec
printer delay. The same above value when transmitted with the “PR.ID” switch
in the down position, is transmitted as:
1234.56 < CR> < LF>
Note: When using the Gemini with a printer, with the “Print ID” switch in the down
position, some printers may notwork, since the printer delayis not transmitted.
PRINT OPTIONS
Thevarious PrintOptions are usedmainly inconjunction with aprinter andthe
Print Request Terminal. They provide a choice of Gemini 5200 data values to be
printed when either the Print Request Terminal is activated or the “Transmit per
Print Options” (P) command is sent to the Gemini 5200. The various Print
Options available are:
A. Print Rate Display A
B. Print Rate Display B
C. Print Display C
D. Print Display A, B, & C
E. Print Display C, Presets1&2,andScale FactorsA&B
F. Print Display B, Presets1&2,andScale FactorsA&B
G. Print Display A, Presets1&2,andScale FactorsA&B
H. Print Display A, B, & C, Presets1&2,andScale FactorsA&B
A typical print-out is shown below. The Print Options are selected by setting
S3, S4 and S5 on the Serial DIP Switch. See “Current Loop Installation” section
for the various switch settings.
When wiring the 20 mA current loop, remove the 7-position terminal block
(TBD),located on the right sideof the top board.Refer to the numbers listedwith
the terminal descriptions below or on the top label, and install each wire in its
proper location on the terminal block. When all connections are made, replace
the terminal block into its proper location.
It is recommended that shielded (screened) cable be used for serial
communications. This unit meets the EMC specifications using Alpha #2404
cable or equivalent. There are higher grades of shielded cable, such as, four
conductor twisted pair, that offer an even higher degree of noise immunity.
TERMINAL DESCRIPTIONS FOR TERMINAL BLOCK TBD
1. -20 mA SRC (COMM.) - Common for 20 mA SRC and Print Request
terminal.
2. PRINT REQUEST - The Print Request Terminal is pulled low to request the
Gemini 5200 to transmit according to the Print Options mode that has been
selected. (Minimum Activation time = 25 msec.)
3.+20 mA SRC- The 20mA SRC terminalprovides the sourcecurrent for oneof
the loops.
4. SO- (Serial Out-)
5. SO+ (Serial Out+)
The Gemini 5200 transmits the requested data on these terminals. They are
connected in series to the receive input of the device to be connected.
6. SI- (Serial In-)
7. SI+ (Serial In+)
The Gemini 5200 receives commands on these terminals. They are connected
in series with the transmit or output terminals of the device to be connected.
Note: The serial input terminals must be held in the mark condition (current on)
in order forthe Gemini 5200to respond to a PrintRequest terminalactivation.
SERIAL DIP SWITCH SET-UP
TheSerialDIP switches are accessible through theside of the Gemini 5200. A
list of the DIP switch positions and their functions are shown in Figure 4.
BR0 & BR1, BAUD RATE - Set-up is shown in Figure 4. When changing the
BaudRate, the unit shouldbe powered-down and thenpowered back up again.
The unit will only recognize a baud rate change upon power-up, after
activating the “Print Request” terminal or after a few characters have been
sentat the new baudrate (If the two previous conditions havenot occurred,the
Gemini will seethe characters as erroneous andit will checkthe baud rate and
set itself to operate at the new rate).
PR.ID - PRINT ID. - When this switch is in the up position, the Gemini 5200
will print the unit address, data value ID and the data value when a
transmission is requested. The unit will also insert a 400 msec delay between
transmissions when the “P” commandor Print Request terminal is used. This
switch position is generally used when the unit is connected with a printer.
When the switch is in the down position, the Gemini 5200 will transmit only the
data value, without the unit address and data ID. The 400 msec delay, described
above,will not be inserted. Thisswitch position usage isintendedfor applications
where the Gemini is communicating with a computer. In these circumstances
printing the address and value ID and inserting a 400 msec print delay is usually
unnecessary and needlessly slows down communication throughput.
PC0, PC1, & PC2, PRINT OPTIONS - Used to control which values are
printed out when the Print Request terminal is activated or when the Transmit
per Print Options command “P” is sent to the Gemini 5200.
AD0, AD1, AD2, & AD3 UNIT ADDRESS - These switches are used to give
eachunit a separate addresswhen more than oneunitis connected in theLoop.
See Figure 4, for Switch Set-up.
FiveGemini 5200s with 20mA Current Loop Option,are used
to monitor the speed and draw of various rollers in a printing
facility. The units are located near the printing presses in the
production area of the building. The communications lines are
run to an Industrial computer located in the production offices.
[OTHER GEMINIS OR RLC PRODUCTS WITH 20 MA CURRENT LOOP
CAN BE CONNECTED IN THE SAME LOOP.]
Note: A Serial Converter Module
is available for interfacing an
RS232 device to Geminis.
The drawing below shows the Current Loop set-up. Each
Gemini 5200 is givenanaddress and the Serial DIP switches
are set accordingly. A Baud Rate of 1200 is selected and set
in each of the Gemini 5200s. An application program is
written, which sends and retrieves data from the units using
the Change and Transmit Value commands.
1.Check all wiring. Refer to theprevious application examples and use themas a
guide to check your serial communication wiring. Proper polarity of all
Geminisand other peripheralsmust be observed.If a multimeteror ammeter is
available, insert it in series in each Serial loop andcheckforcurrentflowwith
all units powered up. If no current is flowing, either the loop is not wired
correctly, or some other fault has occurred. If too much current has been sent
througha Serial Input or Output,the unit may havebeendamaged. If a Gemini
is suspected, it can be tested for operation by using the Serial Loop-back test
described in the next section.
2. If the Gemini is set-up with a “host computer”, device or printer, check to
make sure that the computer or device is configured with the same
communication format as the Gemini. The only communication format the
Gemini will accept is; 1 start bit, 7 data bits, odd parity, and 1 stop bit.
3. Checkthebaud rate settings and make sure all devices in the loop are set tothe
same baud rate.
4. Check the Gemini’s unit address. If the Address command is not used when
transmittinga command to the Gemini,the Gemini’s address must beset to 0. See
“Sending Commands & Data to the Gemini” section for command structure.
5. If two-way communications are to be established between the Gemini and a
computer, try getting the computer to receive transmissions from the Gemini
first. The Gemini’s “PRINT REQ.” terminal can be used to initiate the
transmissions from the Gemini.
6. When sending commands to the Gemini, the * (2Ah) must terminate the
command. NO CARRIAGE RETURNS (0Dh) OR LINE FEED (0Ah)
CHARACTERS SHOULD BE SENT TO THE GEMINI. If they are sent, the
Gemini will not respond to the next command.
7.Forapplications where 1200 Baud or lower is used,the command terminator (*)
can be sent before the string to eliminate any illegally transmitted characters.
SERIAL LOOP-BACK SELF-TEST
The Gemini 5200 has a Serial Loop-back Self-test feature. This test enables the
userto verify the operationof the Gemini whenproblems are encountered tryingto
getthe Gemini and “Host device” communicating. In this test, theGemini’s Serial
Input and Output Loops are connected together with the 20 mA source supplying
the loop current. The Gemini then transmits data “to itself”.If the data is received
properly, the Gemini 5200 will change its Scale Factor B value to 0.1111. To
perform the loop-back test, follow the test sequence as described below.
1. With the unit powered down, wire up the serial terminal block, “TBD”,as
shown in the diagram below.
2. Set the Gemini’s unit address to 15 (set switches 7-10 of the Serial DIP Switch
to the down position).
3. Apply power to the unit. On power-up the Gemini will perform the loop-back
test.Tocheck the results: Call up the ScaleFactor B value by pressing the “3”
key while the Rate B value is being displayed. If the Serial loop is functioning
properly the Scale Factor B value will be 0.1111. If this result is not obtained,
double check the connections with those shown in the diagram, and the unit
address switch positions and repeat step 3.
4. If the connection between the Print Request terminal, “PRINT REQ.” and
“COMMON” is disconnected while the unit is under power, the Scale Factor
B value will change back to its previous setting.
Ifthe unitdoes notpassthis test,contact yourlocal Red LionControls distributor.
APPENDIX “A” - INST ALLA TION& INPUT CONFIGURATIONSWITCH SET-UP
Before installing the Gemini 5200 into the panel, the user should first become
familiar with the unit. It may also be desirable to program the unit for the
application at hand (Refer to the “Programming and Applications” sections).
Oncethe unit is programmed, thesettings will be saved inmemory. The Program
Disable “PGM. DIS.” terminal should be connected to “COMM.” to prevent
accidental or unauthorized programming changes.
PANEL MOUNTING {Note: See Appendix “B” for Dimensions}
Installation Environment
The GEM5200 should be installed in a location that does not exceed the
maximum operating temperature and provides good air circulation. Placing the
unit near devices that generate excessive heat should be avoided.
The bezel should be cleaned only with a soft cloth and neutral soap product.
DoNOTuse solvents. Continuous exposure to direct sunlightmayaccelerate the
aging process of the bezel.
Do not use tools of any kind (screwdrivers, pens, pencils, etc.) to operate the
keypad of the unit.
TheGemini 5200is intended tobe mountedinto an enclosedpanel with
a gasket to provide a water-tight seal. The unit meets NEMA 4/IP65
requirementsforindoor use when properly installed. Two mounting clips
and screws are provided for easy installation. Consideration should be
given to the thickness of the panel. A panel which is too thin may distort
and not provide a water-tight seal. (Recommended minimum panel
thickness is 1/8".)
After the panel cut-out has been completed and deburred, remove the
backing from the adhesive side of the gasket, and carefully apply the
gasket to the panel. DO NOT
GASKET TO THE COUNTER BEZEL. Insert the unit into the panel.
Install the screws into the narrow ends of the mounting clips as shown in
the drawing to the left. Thread the screws into the clips until the pointed
end just protrudes through the other side.
Install each of the two mounting
clips by inserting the wide lip of the
clips into the wide end of the holes
located on either side of the case.
Tighten the screws evenly,
applying uniform compression,
thus providing a water-tight seal.
The AC power to the unit must be selected for either 115 VAC or 230 VAC.
The selector switch is located through an access slot on the side of the case (See
the Installation Figure on the previous page, or the label on the case). The unit is
shipped from the factory with the switch in the 230 VAC position.
Caution: Damage tothe unitmay occur if theAC selector switchis set incorrectly.
EMC COMPLIANCE INSTALLATION
This unit complies with the Electromagnetic Compatibility (EMC) standards
listed in the specifications. Compliance to the EMC standards was demonstrated
by means of a test set-up using the following installation methods:
1. Unit mounted in a metal panel connected to earth ground (protective earth).
2.Shielded (screened) cablesfor Signal and Controlinputs with shielddrain wire
connected to earth ground at the mounting panel only.
Belden#8451 2conductor, #22AWGtwisted pairwith foilshield and drainwire
Belden #8771 3 conductor, #22 AWG with foil shield and drain wire
Alpha #2404 4 conductor, #22 AWG with foil shield and drain wire
3. Metal bezel of unit connected to mounting panel with 9 inch (23 cm) ground
lead from rear bezel screw. Test: Immunity to ESD per EN61000-4-2.
4. EMI filter (Shaffner FN610) placed on the DC mains cable when using
optional DC power supply. Test: EFT Immunity per EN61000-4-4.
SHIELD TERMINATION
EMC compliance installation testing had the drain wire for the shielded cable
terminated as shown. The drain wire was less than 0.5" (12.7 mm) long.
Although this unit is designed with a high degree of immunity to
ElectroMagnetic Interference (EMI), proper installation and wiring methods
must be followed to ensure compatibility in each application. The type of the
electrical noise, source or coupling method into the unit may be different for
various installations. Listed below are some additional EMC guidelines for
successful installation in an industrial environment.
1. The unit should be mounted in a metal enclosure, which is properly connected
to protective earth.
a. If the bezel is exposed to high Electro-Static Discharge (ESD) levels,
above 4 Kv, it should be connected to protective earth. This can be done
bymaking sure themetal bezel makesproper contact tothe panelcut-out
or connecting the bezel screw with a spade terminal and wire to
protective earth.
2. Use shielded (screened) cables for all Signal and Control inputs. The shield
(screen) pigtail connection should be made as short as possible. The
connection point for the shield depends somewhat upon the application.
Listed below are therecommendedmethodsofconnecting the shield, in order
of their effectiveness.
a. Connect the shield only at the panel where the unit is mounted to earth
ground (protective earth).
b. Connect the shield to earth ground at both ends of the cable, usually
when the noise source frequency is above 1 MHz.
c. Connect the shield to common of the unit and leave the other end of the
shield unconnected and insulated from earth ground.
3. Never run Signal or Control cables in the same conduit or raceway with AC
etc. The cables should be run in metal conduit that is properly grounded. This
is especially useful in applications where cable runs are long and portable
two-way radios are used in close proximity or if the installation is near a
commercial radio transmitter.
4. Signal or Control cables within an enclosure should be routed as far away as
possible from contactors, control relays, transformers, and other noisy
components.
5. In very electrically noisy environments, the use of external EMI suppression
devices,such asferrite suppression cores,is effective.Install themon Signal and
Control cables as close to the unit as possible. Loop the cable through the core
several times or use multiple cores on each cable for additional protection.
Install line filters on the power input cable to the unit to suppress power line
interference. Install them near the power entry point of the enclosure. The
following EMI suppression devices (or equivalent) are recommended:
Ferrite Suppression Cores for signal and control cables:
Note: Reference manufacturer’s instructions when installing a line filter.
6. Long cable runs are more susceptible to EMI pickup than short cable runs.
Therefore, keep cable runs as short as possible.
7. Switching of inductive loads produces high EMI. Use of snubbers across
inductive loads suppresses EMI.
Snubbers: RLC #SNUB0000
WIRING CONNECTIONS
After the unit has been mechanically mounted, it is ready to be wired. All
conductors should meet voltage and current ratings for each terminal. Also
cablingshould conform to appropriatestandards of good installation,local codes
andregulations. It is recommendedthat power suppliedtothe unit (ACor DC) be
protected by a fuse or circuit breaker. All wiring connections are made on
removable plug-in terminal blocks. There is a separate terminal block for the
bottom board (TBA), relay board (TBB), rate inputs (TBC), and optional Serial
Communications (TBD). When wiring the unit, remove the terminal block and
use the numbers on the label to identify the position number with the proper
function. Simply strip the wire, leaving approximately 1/4" bare wire exposed
(stranded wires should be tinned with solder). Insert the wire into the terminal
andtighten down thescrewuntil the wireis clamped in tightly.Each terminal can
accept up to two 18-gage wires. After the terminal block is wired, install it in the
proper location on the PC board. Wire each terminal block in this manner.
Forbestresults, the A.C. primary power shouldbe relatively “clean” and within
thespecified+/-10% variation limits. Drawing power from heavily loaded circuits
or from circuits that also power loads that cycle on and off, should be avoided.
TheAC power is connected tothebottom left terminals TBA 1& 2, marked as
AC Power,50/60Hz.The voltage selector switch, located on the side of the unit,
is used to select the proper voltage. The switch is a slide movement type and can
beset by using asmall screwdriver. Iftheswitch is towardsthe front of theunit, it
is set for 230 VAC input. The switch is in the 230 VAC position when shipped
from the factory.
Note: Beforeapplying powerto theunit, make sure the AC power selector switch
is set for the proper voltage setting.
USING AN EXTERNAL DC POWER SOURCE
The Gemini 5200 can be operated from a D.C. power source that provides
11-14 VDC at the unit’s rated power consumption (700 mA). The power source
canbea 12 V battery or an external power supplythatis capable of supplying the
unit’s rated current. It is not necessary to provide battery backup to retain
programming information. The Gemini 5200 has an internal non-volatile
memory in which the programming information is stored upon power-down.
Refer to the “Block Diagram” section.
RELAY WIRING
To prolong contact life and suppress electrical noise interference due to the
switching of inductive loads, it is good installation practice to install a snubber
across the contactor. Follow the manufacturer’s instructions for installation.
Note: Snubberleakage currentcan causesome electro-mechanical devices to be
held ON.
SERIAL COMMUNICATIONS
The Gemini 5200 can be purchased with a 20 mA Current Loop
Communications Option. On these units, refer to the “Current Loop
Communications” section of the manual for wiring and operational procedures
of the Serial Loop.
INPUTSA&BANDMAGNETIC PICKUP INPUTSA&B
The Gemini 5200 has two input channels. Input Channel A is associated with
Rate Display A and Channel B is associated with the Rate Display B. The
MagneticPickup Input andthe Logic Inputof each channelutilize somecommon
circuitry. For this reason the Input switches are used to set up both the Magnetic
and Logic Input.
S1 selects between Magnetic Pickup Input A and Logic Input A. S5 selects
between Magnetic Pickup Input B and Logic Input B. WHEN MAGNETIC
PICKUP A IS BEING USED, S2 MUST BE IN THE “SNK” POSITION or the
unit will not display the rate properly. Likewise, WHEN MAGNETIC PICKUP
B IS BEING USED, S6 MUST ALSO BE IN THE “SNK” POSITION.
S3 (HI/LO FRQ) and S4 (HI/LO BIAS) or S7 (HI/LO FRQ) and S8 (HI/LO
BIAS) do not effect the Magnetic Pickup InputsA&Bandtheir settings are
inconsequential. When S1 or S5 is in the Logic position, the Magnetic Pickup
Input A or B is disabled and Inputs A or B can be used as logic inputs.
Note: A Magnetic Pickup type sensor should not be used unless a large enough
1. SENSOR VOLTAGE AND CURRENT
The +12 V sensor supply voltage on the “DC OUT” terminal is nominal with
+/-25% variation due to line and internal load variations. All RLC sensors
will accommodate this variation.
2. HI/LO FRQ SELECTION
The HI/LO FRQ selection switch must be set on “LO FRQ” when switch
contacts are used to generate rate input signals. Since the “LO FRQ” mode
also provides very high immunity against electrical noise pickup, it is
recommended that this mode also be used, whenever possible, withelectronic
sensor outputs. The “LO FRQ” mode can be used with any type of sensor
output, provided pulse widths never decrease below 5 msec, and the rate does
not exceed 100 cps.
3. V
and VIHlevels given are nominal values +/-10% when the voltage on “DC
IL
OUT” terminal is +12 VDC. These nominal values will vary in proportion to
the variations in the “DC OUT” terminal voltage, which are caused by line
voltage and load changes.
4. When shielded cable is used, the shield should be connected to “COMM.” at
the counter and left unconnected at the sensor end.
5. Inputs A and B can accept source pulses from other circuits up to +28 V in
amplitude. For voltages above +28 V, a limiting resistor and zener diode
should be used to limit the voltage at the input.
INSTALLATION & REMOVAL OF THE RELAY BOARD
To install the relay board, locate the relay opening at the lower right-hand
corner,on the back of the Gemini5200. Pull the tab down whilesliding the board
into the two slots in the housing. The relay board will seat into the unit, allowing
the tab to return to its original position. To remove the relay board, pull down on
the tab just enough to allow the relay board to slide out. Grasp the six terminal
connector and pull to remove the board.
The accompanying diagram shows the details of the logic and magnetic
pickup circuitry. The four switches used to set up Logic Input A and Magnetic
Pickup A are designated S1, S2, S3, and S4. The four switches used to set up
Logic Input B and Magnetic Pickup B are designated S5, S6, S7, and S8. The
functions of these switches are as follows:
S1 - MAG: Enables the Magnetic Pickup terminal to be used.
LOGIC: Disables the Magnetic Pickup Input.
Note: SWITCH S2 MUST BE IN THE “SNK” POSITION FOR
MAGNETIC PICKUP OPERATION.
S2-SNK: Provides a 7.8 K pull-up resistor forsensors with current sinking
outputs.
SRC: Provides a 3.9 K pull-down resistor for sensors with current
sourcing outputs.
S3 - HI FRQ: Removes damping capacitor and allows operation up to the
max. count frequency. Min. count ON or OFF time - 50 usec.
LO FRQ: Connects damping capacitor for switch contact debounce.
Limitscount speedto 100 cpsmax. Min.countpulse ONor OFFtime5 msec. (See Note 2.)
S4 - HI BIAS: Sets input trigger levels at mid-range to accept outputs from
2-wire proximity sensors, resistive photo-cells, and logic pulses with
full 0 to +12 V swings. (V
LO BIAS: Sets input trigger levels to the low range to accept logic
pulseswith 0to 5Vswings. (V
S5 - Same as S1, for Magnetic pickup B and Logic Input B.
S6 - Same as S2, for Magnetic pickup B and Logic Input B.
S7 - Same as S3, for Logic Input B.
CHAN. BCHANNEL A
S8 - Same as S4, for Logic Input B.
S9 - DIS. RST.: Disables front panel Reset button, “R”.
EN. RST.: Enables front panel Reset button “R”, if “Operator
Accessible Functions” mode (code 66) has reset enabled.
S10 - Not used.
= 5.5 V, VIH= 7.5 V, See Note 3.)
IL
=1.5 V,VIH=3.75 V,See Note3.)
IL
Note: The circuitry for Channel B (Input B and Mag. Pkup.) is identical to
that shown for A.
Note: At frequencies below 0.03 Hz (1 pulse every 32 sec.) the rate indicator
will display a zero.
9. RATE MAXIMUM INPUT FREQUENCY: 10 KHz
10. CONTROL INPUTS:Reset- Active low(V
3 mA), Activation & De-activation response time = 10 msec.
Program Disable - Active low (V
VDC (I
Print Request - (GEM521xx only) Active low, (V
Type- Bi-directional 20mA currentloop,20 mAsource provided. (Powersup
to 7 units in a loop with internal current source.)
Baud Rate - Programmable 300 to 2400.
Maximum Address - 16 units. (Actual number in a single loop is limited by
serial hardware specifications.)
Data Format - 10 bit frame, Odd parity (one start bit, 7 data bits, one odd
parity bit, and one stop bit.)
Serial Hardware Specifications -
SO - Output Transistor Rating: V
SI - Input Diode Rating: V
Note: The compliancevoltage rating ofthe source must be greaterthan the
F
max
= 1.25 V
= 30 VDC, V
; 1.5 Vmax
TYP
SAT
=1V
max
at 20 mA
sum of the voltage drops around the loop.
12. OUTPUTS:
Solid-State - Current sinking NPN open collector transistors. I
maximum @ V
protection).
=1V.VOH= 30 VDC max. (Internal Zener diode
CE
SNK
= 100 mA
Relays - Mounted on a field replaceable PC board. Form C contacts rated at 5
amps @ 120/240 VAC or 28 VDC (resistive load), 1/8 H.P. @ 120 VAC
(inductive load). The operate time is 5 msec. nominal and the release time is 3
msec. nominal.
Relay Life Expectancy - 100,000 cycles at Max. Rating. (As load level
decreases, life expectancy increases.)
Programmable Timed Outputs - The timed outputs can be set from 0.01 to
599.99 seconds, +/-(0.01% + 10 msec.).
13. ENVIRONMENTAL CONDITIONS:
Operating Temperature: 0 to 50°C
Storage Temperature: -40 to 70°C
Operating and Storage Humidity: 85% max. relative humidity
(non-condensing) from 0°C to 50°C.
Altitude: Up to 2000 meters
14. CERTIFICATIONS AND COMPLIANCES:
SAFETY
IEC 1010-1, EN 61010-1: Safety requirements for electrical equipment
for measurement, control, and laboratory use, Part 1.
IP65 Enclosure rating (Face only), IEC529
Type 4 Enclosure rating (Face only), UL50
The majority of difficulties arising with the Gemini 5200
and programming set-up. Always check all connections, function codes, Scale Factor, and
presets as a first step in troubleshooting.
Before applying power, double check all wiring. Improper AC voltage or AC connections
may result in permanent damage to the unit.
For further technical assistance, contact technical support at the appropriate company
numbers listed on the back cover of this instruction manual.
PROBLEMPOSSIBLE CAUSEREMEDIES
NO DISPLAY1. Power off, improperly connected, or power1. Check all wiring, verify power.
brown-out.
P ON DISPLAY1. Data error on power-up.1a. Press “E” key.
E ON THE DISPLAY1. Data error detected by processor.1a. Press “E” key.
NO RESPONSE TO FRONT PANEL1. Panel disabled.1. Consult manual on “Operator Accessible
NO RATE INDICATION1. No input.1. Check sensors/connections.
41UNIT PERSONALITY(-)Loads factory set code values*
42RESET BUTTON & TERMINAL ACTUATION MODES
43RATE B CONVERSION FACTOR
44RATE B MINIMUM UPDATE TIME
45RATE B SCALE MULTIPLIER
46RATE B DECIMAL POINT & LEAD ZERO BLANKING
* Polarity sign is displayed in front of the identifier, a (-) sign is displayed, a (+) sign is not.
+/-1Dual Rate W/O Display CRate AÞDisplay A, Rate BÞDisplay B
+/-2Dual Rate W/ Ratio (A/B)See Appendix “E” for a Function Command Code
+/-3Dual Rate W/ Difference (A-B)Summary when in these modes
+/-4Dual Rate W/ Draw [(A-B)/B]
1Reset Rate A Output(s)Reset only affects the output(s) and does not
2Reset Rate B Output(s)change the rate display.
3Reset RateA&BOutputs
1Rate Per Second (x1)
2Rate Per Minute (x60)
3Rate Per Hour (x3600)
10.5 sec minimum/1 sec maximum
21 sec minimum/2 sec maximum
32 sec minimum/4 sec maximum
44 sec minimum/8 sec maximum
58 sec minimum/16 sec maximumMaximum rate = 7500 cps.
616 sec minimum/32 sec maximumMaximum rate = 3250 cps.
1x1000
2x100
3x10
4x1
5x0.1
6x0.01
(+) Leading Zero Blanking Enabled
(-) Leading Zero Blanking Disabled*
APPENDIX “D” - GEMINI 5200 DUAL RATE W/O DISP C FUNCTION COMMAND CODE SUMMARY
+/-1No Decimal Point
+/-2Decimal Point Right of Digit 2
+/-3Decimal Point Right of Digit 3
+/-4Decimal Point Right of Digit 4
+/-5Decimal Point Right of Digit 5
+/-6Decimal Point Right of Digit 6
51OUTPUT ASSIGNMENT
+/-1Output 1 to Rate A, Output 2 to Rate B
+/-2Outputs1&2toRate B
+/-3Outputs1&2toRate A
52OUTPUT 1 TERMINATION MODES
+/-3Terminate at Manual Reset
+/-4Terminate at Manual Reset End
+/-5Terminate after Timed Output 1
+/-6Boundary
53TIMED OUTPUT 1 VALUERange 0.01 to 599.99 sec.
54OUTPUT 2 TERMINATION MODES
+/-3Terminate at Manual Reset
+/-4Terminate at Manual Reset End
+/-5Terminate after Timed Output 2
+/-6Boundary
55TIMED OUTPUT 2 VALUERange 0.01 to 599.99 sec.
*Polarity sign is displayed in front of the identifier, a (-) sign is displayed, a (+) sign is not.
1Reset Rate A Output(s)Reset only affects the output(s) and does not
2Reset Rate B Output(s)change the rate display.
3Reset RateA&BOutputs
4Reset Display C Output(s)
5Reset Display C & Rate A Outputs
6Reset Display C & Rate B Outputs
1Rate Per Second (x1)
2Rate Per Minute (x60)
3Rate Per Hour (x3600)
1x1000
2x100
3x10
4x1
5x0.1
6x0.01
(+) Leading Zero Blanking Enabled
(-) Leading Zero Blanking Disabled*
+/-1No Decimal Point
APPENDIX “E” - GEMINI 5200 DUAL RATE W/ DISP C FUNCTION COMMAND CODE SUMMARY
+/-2Decimal Point Right of Digit 2
+/-3Decimal Point Right of Digit 3
+/-4Decimal Point Right of Digit 4
+/-5Decimal Point Right of Digit 5
+/-6Decimal Point Right of Digit 6
51OUTPUT ASSIGNMENT
+/-1Output 1 to Rate A, Output 2 to Rate B
+/-2Outputs1&2toRate B
+/-3Outputs1&2toRate A
+/-4Output 1 to Rate B, Output 2 to Display C
+/-5Output 1 to Rate A, Output 2 to Display C
+/-6Outputs1&2toDisplay C
52OUTPUT 1 TERMINATION MODES
+/-3Terminate at Manual Reset
+/-4Terminate at Manual Reset End
+/-5Terminate after Timed Output 1
+/-6Boundary
53TIMED OUTPUT 1 VALUERange 0.01 to 599.99 sec.
54OUTPUT 2 TERMINATION MODES
+/-3Terminate at Manual Reset
+/-4Terminate at Manual Reset End
+/-5Terminate after Timed Output 2
+/-6Boundary
* Polarity sign is displayed in front of the identifier, a (-) sign is displayed, a (+) sign is not.
The Gemini 5200 offers a simplified method of scaling the rate indicator. The
methoddoes notrequiretime unitconversions. The desiredtime format(Rate Per
Second, Rate Per Minute, Rate Per Hour) is simply selected as part of the
programming procedure.
Due to the way the rate is calculated, high resolution and accuracy can be
realizedat allinput rates, slowor fast.It isnotnecessary toincrease thenumber of
pulses per display unit to obtain higher resolution.
The Rate Minimum Update Time, function code 63, can be increased (from
0.5 Sec.upto 16 Sec.) to provide averaging in applications where the input pulse
spacing is not stable. The Update time selected, however, will not affect the
scaling in any manner.
Scaling the Rate channel simply involves programming the Gemini 5200 so
that pulse units inputted to the unit will be scaled to the desired display units
(revolutions,feet, meters, etc.),in the desiredtime format (RatePer Second, Rate
per Minute, Rate Per Hour).
In order to scaletherate,it is only necessary to know the number of pulses per
“Display Unit” or units (feet, revolutions, etc.). For example; if a 48 tooth gear,
which is coupled to a shaft, is being sensed and it is desired to indicate the shaft
speed inrevolutions, the “Display Units” would be revolutions. It is obvious that
48 pulses will occur in one revolution.
Inorder to convert the pulse unitsto revolutions, it is necessary forthe Gemini
5200 to multiply the number of pulses by a scaling factor to convert the pulse
unitsto revolutionunits. TheGemini5200 hastwo programmingcodes that serve
to scale pulse units to desired display units. They are: the Scale Factor and the
Scale Multiplier. Both are used to attain the Total Scaling Factor, “K
Tocalculatethe Total Scaling Factor, “KT”, for the application, the following
”.
T
formula is used.
FORMULA #1: K
= Display Units/Number of Pulses
T
WHERE:
DISPLAYUNITS
-The number ofunits (revolutions, feet,10ths offeet,meters,
etc.) that would be acquired after the “Number of Pulses” has occurred.
NUMBEROF PULSES
-The Number of pulses requiredto achieve the number
of “Display Units”.
Using the example previously discussed, the display unit would be 1
revolution and the number of pulses per display unit would be 48. Therefore, the
TotalScale Factor wouldbe 0.020833 (K
rev/48 pulses per rev = 0.020833). In many applications the Total Scale Factor,
“K
”, can be programmed as the Scale Factor, “SF”, and the Scale Multiplier
T
factory setting, x1, would be used. However, in some applications, such as the
=Display Units/ Numberof Pulses =1
T
one above,itmay be desired to obtain more significant digits in the Scale Factor,
“SF”.These situations occur whenthe “K
thatcanbe entered into the four decimal places availableto the Scale Factor. The
”factor does not calculateto a number
T
following formula can be used to calculate the Scale Factor when a SCM value
other than x1 is needed.
FORMULA #2: SF=K
/SCM
T
In this formula, the Total Scaling Factor, previously calculated, is divided by
the Scale Multiplier Value, “SCM”, to obtain the Scale Factor, “SF”.
The general rule for choosing a SCM value is, when the Total Scale Factor,
“K
”, is less than 0.6000, a SCM value of 0.1 or 0.01 can be used to get a Scale
T
Factorvalue between 0.6 and5.9999, or to thepoint where themaximumnumber
of significant digits is obtained. If the Total Scaling Factor, “K
5.9999,then a SCM valueof 10, 100, or1000 can be usedtoobtain a Scale Factor
”, is greater than
T
Value between 0.6 and 5.9999.
In our initial example, the Total Scaling Factor, “K
0.020833. It is easy to see that this number cannot be programmed into the Scale
”, was determined to be
T
Factor, “SF”, without losing significant digits. Using formula #2 and the general
rulesstated above,a Scale MultiplierValue of 0.01is chosenand the ScaleFactor
is calculated as shown below. This will provide the maximum amount of
conversion accuracy possible.
SF=K
/SCM
T
SF = 0.020833/SCM
SF = 0.020833/0.01 = 2.0833
In situations where the Total Scale Factor is already in range of the Scale
Factor (0.0001 to 5.9999) and when there are no significant digits lost, the Total
Scaling Factor, “K
anda Scale Multiplier valueof 1 (thefactory set value) canbe used. For example;
”, can be programmed directly into the Scale Factor Value
T
if the display units are in feet and there are 100 pulses per foot, the Total Scaling
Factor, “K
0.01).Since the TotalScaling Factor,“K
into the Scale Factor Value, “SF”. The Scale Multiplier Value, “SCM”, can be
”, would be 0.01 ( KT= Display Units/Number of Pulses = 1/100 =
T
”,is exactly 0.01,it canbe programmed
T
left at or programmed to its factory setting of x1.
After the Scale Factor and Scale Multiplier values are selected, all that is
necessary to complete the scaling is to choose the Rate Conversion Factor. The
RateConversion Factor can be selectedtoprovide indication in Rate perSecond,
Rate Per Minute, or Rate per Hour.
Note: There may be situations where there are manymore pulsesper display unit
than needed. In these situations the minimum SCM value (0.01) may not
provide enough significant digits in the Scale Factor. To achieve more
significant digits, the Rate Conversion Factor should be set to mode 1, Rate
per Second, and the following formula should be used.
SF = K
xCF
T
SCM
Where: CF = 60 for display reading in Rate Per Minute, or
CF = 3600 for display reading in Rate Per Hour
SCALING DISPLAY C
In the Speed Ratio and Speed Draw modes, [41 2,4], Display C can be scaled
in order to obtain the desired amount of decimal point resolution. This is
accomplished by selecting a “Display C Multiplier” and the proper “Display C
Decimal Point & Leading Zero Blanking” mode.
In the Speed Ratio and Speed Draw modes the Gemini 5200 performs the
appropriate Display C calculation based upon the measured internal rate value,
utilizing the total number of significant digits available to it. It does not use the
amount of resolution that is used in the Rate A & B displays. For example; if the
Gemini5200 was set-upin mode [41 2], Dual Ratewith Speed Ratio,and the rate
indicators were programmed to indicate rate with no decimal point. With actual
rates of 1.5 PPS for Rate A, and 1 PPS for Rate B the rate displays would both
read 1, however, Display C, when using a Display C Multiplier of 10 and a
decimal point, would read 1.5 (C = A/B = 1.5/1 = 1.5).
RATE SCALING EXAMPLES
EXAMPLE #1:
A 60 tooth gear is mounted to a roller that has a circumference of 2 feet. It is
desired to have a rate readout in 10ths of feet per minute. Calculate the Scale
Factor and Scale Multiplier values necessary to provide the desired readout.
In this example one revolution of the roller will provide 60 pulses for 2 feet of
linear travel. Since the desired display units are to be in tenths of feet, it is
necessaryto convert 2feet totenths,giving us20 tenths (displayunits). The Total
Scaling Factor, “K
formula #1.
In order to get the maximum number of significant digits in the Scale Factor
we use formula #2 and a Scale Multiplier value of 0.1 as shown below.
To obtain rate indication in Feet Per Minute, the Rate Conversion Factor is
programmedfor Rate per Minute mode. A decimal pointisalso added to provide
for a display of feet in 10ths.
EXAMPLE #2:
Theshaft of a positivedisplacementpump has a 14tooth sprocket that is being
sensedby a magnetic pickup. It is knownthat when the unit is pumping810 liters
of water per minute, the shaft is turning 400 RPM. It is desired to have a display
readout in liters per minute.
Withthe Gemini 5200,it is notnecessary todealwith timeunitconversions. From
the information given, we know that when the shaft has turned 400 revolutions, 810
liters of water will have been pumped. The first step we need to take, is to calculate
the number of pulses that occur when 810 liters have been pumped.
NUMBER OF PULSES = # of Revolutions x Pulses per Rev.
NUMBER OF PULSES = 400 Rev x 14 Pulses per Rev = 5600 pulses.
”, is calculated by simply plugging in the two numbers into
For Information on Pricing, NEMA Enclosures, Base Mount Kits, & Panel Adapter Kits,
refer to the Red Lion Controls Catalog or contact your local RLC distributor.
The Company warrants the products it manufactures against defects in
materials and workmanship for a period limited to one year from the date of
shipment, provided the products have been stored, handled, installed, and used
under proper conditions. The Company’s liability under this limited warranty
shall extend only to the repair or replacement of a defective product, at The
Company’s option. The Company disclaims all liability for any affirmation,
promise or representation with respect to the products.
The customer agrees to hold Red Lion Controls harmless from, defend, and
indemnify RLC against damages, claims, and expenses arising out of
subsequent sales of RLC products or products containing components
manufactured by RLC and based upon personal injuries, deaths, property
damage, lost profits, and other matters which Buyer, its employees, or subcontractors are or may be to any extent liable, including without limitation
penalties imposed by the Consumer Product Safety Act (P.L. 92-573) and
liability imposed upon any person pursuant to the Magnuson-Moss Warranty
Act (P.L. 93-637), as now in effect or as amended hereafter.
No warranties expressed or implied are created with respect to The Company’s
products except those expressly contained herein. The Customer acknowledges
the disclaimers and limitations contained and relies on no other warranties or
affirmations.
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.