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AGE

1.1.7 DIGITAL COMMUNICATIONS

The instrument can be ordered with a Digital Communications option that provides the
capability of bi-directional communications with a supervisory computer. A dual pen
instrument can have an individual address selected for each pen.

FIGURE 1-2

Digital Display

F
U

ALRM

Minus
Sign

OUT2

OUT1

MAN

Setpoint

RAMP

SOAK

SEG1 SEG2 SEG3 SEG4

SEG5 SEG6

Pen 1 Display

Digital Display

Alarm

ALRM

Minus
Sign

OUT2

OUT1

MAN

Manual

Output 1 Output 2

Setpoint

Pen 2 Display (if Present)

Summary of Contents for MRC 7700

Page 1: ...low Corporation Two Campion Rd New Hartford NY 13413 USA 315 797 2222 FAX 315 797 0403 MRC7700 Installation Wiring Operation Manual CIRCLE CHART RECORDER RECORDER CONTROLLER RECORDER CONTROLLER PROFIL...

Page 2: ...ler Manual It was written and produced en tirely on a desk top publishing system Disk versions are available by written request to the Partlow Advertising and Publications Department We are glad you d...

Page 3: ...tion 23 SECTION 4 OPERATION 4 1 Operation 43 4 2 Alarm Operation 47 4 3 Tune Mode Operation 48 SECTION 5 SERVICE 5 1 Service 51 5 2 Changing Charts 51 5 3 Changing Pens 51 5 4 Calibration 52 5 5 Test...

Page 4: ...y Output 18 Figure 2 13 SSR Driver Output 19 Figure 2 14 Current Output 19 Figure 2 15 Transmitter Power Supply Input 20 Figure 2 16 Position Proportioning Control Output 20 Figure 3 1 Keypad Features...

Page 5: ...m unauthorized changes by the Enable mode security system and is protected against memory loss as a result of AC power outage by battery back up The process sensor input for each terminal board is use...

Page 6: ...state relay driver and milliamp DC outputs Instruments can be programmed for on off time proportioning current proportioning or position proportioning control depending upon the output s present Relay...

Page 7: ...ations with a supervisory computer A dual pen instrument can have an individual address selected for each pen FIGURE 1 2 Digital Display C F U ALRM Minus Sign OUT2 OUT1 MAN SP Setpoint RAMP SOAK SEG1...

Page 8: ...rom excessive moisture oil dust and vibration Do not subject the instrument to operating temperatures outside of the 0 to 55 C 32 to 131 F range Mounting 2 4 Figure 2 1 page 9 shows an installation vi...

Page 9: ...For maximum electrical noise reduction the noise generating devices should be mounted in a separate enclosure 2 If possible eliminate mechanical contact relay s and replace with solid state relays If...

Page 10: ...talk Cross talk is due to the EMF Electro Magnetic Flux emitted by a wire as current passes through it 2 5 1 4 USE OF SHIELDED CABLE Shielded cable helps eliminate electrical noise being induced on th...

Page 11: ...PAGE 11 FIGURE 2 2 FIGURE 2 3 Inductive Load 0 5 mfd 1000V 220 ohms 115V 1 4W 230V 1W Inductive Load R C MOV AC...

Page 12: ...12 1 08 2 68 1 21 3 30 3 29 1 82 22 00 4 68 4 07 14 1 74 4 29 1 95 5 34 5 29 2 92 35 00 7 44 6 37 16 2 74 6 76 3 08 8 30 8 35 4 60 55 50 11 82 10 11 18 4 44 11 00 5 00 13 52 13 65 7 47 88 50 18 80 16...

Page 13: ...of leadwire in thousands of feet TABLE 3 3 Wire RTD AWG No Error C Error F 10 0 04 0 07 12 0 07 0 11 14 0 10 0 18 16 0 16 0 29 18 0 26 0 46 20 0 41 0 73 24 0 65 1 17 TABLE 4 2 Wire RTD AWG No Error C...

Page 14: ...e 3 or 4 conduit openings depending upon the number of outputs specified To help minimize electrical noise that may adversely affect the operation of the instrument the wires groups indicated below sh...

Page 15: ...instruments The switch position must match the voltage input to the instrument FIGURE 2 6 Thermocouple Inputs For Relative Humidity calculations both sensor inputs must be the same kind For best resu...

Page 16: ...See Appendix A 1 page 68 FIGURE 2 8 Volt and milliamp Input Make the volt and milliamp connections as shown below Use TB4 for the Dry Bulb input and TB5 for the Wet Bulb input Terminal 1 is positive...

Page 17: ...pens on a dual pen instrument are selected to profile control the Remote Run Hold will affect the operation of both pens FIGURE 2 10 Remote Setpoint Input VDC mADC Optional for the second pen of dual...

Page 18: ...ransmission output for Pen 1 and or Pen 2 if present The assignment of the output function s are is accomplished in the Program mode SPST relay and or SSR driver output s is are designated as Relay A...

Page 19: ...to 20 mADC Each output must be assigned to the desired function in the Program mode Terminal connections are made using TB10 through TB13 for current output A through D respectively Connect positive...

Page 20: ...Proportioning Control Output Position Proportioning control requires that two relays or SSR Drivers and the Position Proportioning Auxiliary input be specified On a dual pen instrument either pen may...

Page 21: ...ode Function Description Off oFF Operation Outputs and Alarms are Off Chart may stop rotating selectable Control CtrL Control Outputs and Alarms Operate oPEr Operation are Active Recorder Test tESt Se...

Page 22: ...strument and verify that they are in the proper position for the intended application The sensor input jumpers JU4 JU5 JU6 and JU7 condition the sensor input signals and must be used in conjunction wi...

Page 23: ...s alive Then 77XX will be displayed X representing digits then XXXX then XXXX identifying the twelve digit model number as defined in the order matrix Next the EPROM part number will be indicated P XX...

Page 24: ...er keys a With the UP key to display proportional output b With the DOWN Key 1 On power up to alter model 2 Enter Cal Test functions UP Used to 1 Exit a mode 2 Turn a mode On in the Enable mode 3 Incr...

Page 25: ...to and remain at a point above the top graduation on the chart and the chart will stop rotation to allow the chart to be changed The pens will remain fully upscale with the chart OFF otherwise the uni...

Page 26: ...HC iSi1 Prog out1 o1uL o1LL out2 o2uL o2LL AL1 AL2 diSP A A B dPoS Euu Pen 1 Only EuL Pen 1 Pen 2 ON OFF Actual Display On Off Display Use arrow keys to turn on or off Scroll Key Numeric Display Use a...

Page 27: ...PAGE 27 HyAo rSP rSPu rSPL SPuL HyCo SPLL AtFr Prnd dFF PFF Pout Pou PoL Cru C C B CrL P1EC P2EC D...

Page 28: ...PAEC rLyF rLyg rLyH CurA Curb CurC Curd CoAr Cobr E E D CoCr Codr Ptb F Units ON OFF Actual Display On Off Display Use arrow keys to turn on or off Scroll Key Numeric Display Use arrow keys to change...

Page 29: ...PAGE 29 rrH PPC PIA F Crt Coo Com Optional Con CbS CAd1 CAd2 PAPu...

Page 30: ...arameters that will appear on the specific instrument will depend upon the model number hardware configuration of the instrument and on the parameter selections previously made For future reference re...

Page 31: ...tioning Reverse 7 Position Proportioning open 8 Output 1 Percent o1uL 0 to 100 percent 100 Upper Limit o1uLand o1LL will not be seen if out1 0 1 2 9 Output 1 Percent o1LL 0 to 100 percent 0 Lower Limi...

Page 32: ...300 3 Alarm Outputs Width of Hysteresis Band See page 72 for definition 21 Remote Setpoint rSP 0 to 2 0 Pen 2 only 0 Not used If rSP is set to zero then 1 1 to 5VDC rSPo and rSPL are not seen 2 0 to...

Page 33: ...or Condition 0 Pen goes to 0 of chart 1 Pen goes to 100 of chart NOT AVAILABLE ON RECORDER ONLY INSTRUMENTS Pressing the SCROLL key with the PAEC parameter value displayed in the Pen 1 window will adv...

Page 34: ...Pen 1 2 Assigned to Process Value Output Pen 2 3 Assigned to Output 1 Pen 1 4 Assigned to Output 2 Pen 1 5 Assigned to Output1 Pen 2 6 Assigned to Output 2 Pen 2 47 Current Output B Curb Same selectio...

Page 35: ...o 0 Chart continues rotating 1 in Off Mode in the Off mode 1 Chart stops rotating while in the Off mode Communications Options Parameters 61 Communication Con 0 Off 3 Configuration 1 Monitor Mode Read...

Page 36: ...AL1 PAL2 dAL2 SoP tunE bAL2 Pb1 Pb2 rSEt ArS1 ArS2 rt1 rt2 Ct1 A A Ct2 SEnS FoP bAro ON OFF Actual Display On Off Display Use arrow keys to turn on or off Scroll Key Numeric Display Use arrow keys to...

Page 37: ...or illustration purposes all available Tune mode parameters have been listed The parame ters that will appear on the specfic instrument will depend upon the parameter selections previously made in the...

Page 38: ...vative Will be seen if Pb1 was seen 14 Rate Output 2 rt2 0 0 to 10 0 minutes 0 0 Derivative Will be seen if Pb2 was shown 15 Cycle Time Output 1 Ct1 1 to 240 seconds 30 Will be seen if out1 3 4 7 16 C...

Page 39: ...s Alarm Direct the alarm will be ON if the process value is greater than the process alarm value selected in the Alarm Set mode Process Alarm Reverse the alarm will be ON if the process value is less...

Page 40: ...ter selecting the Prolile End Control parameter value press the SCROLL key to advance the display to Pn Press the UP key with Pn or any parameter code displayed to exit the Profile Entry Mode Event ou...

Page 41: ...ith the enable mode prompt for the desired mode displayed press the SCROLL key to verify that the displayed mode is either on enabled or oFF disabled Press the DOWN key to turn off the mode press the...

Page 42: ...PE ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ESPC ON OFF ON OFF Actual Display On Off Display Use arrow keys to turn on or off Scroll Key Numeric Display Use arrow keys to change value Up Arrow...

Page 43: ...rogram mode to see that you are not trying to increase the setpoint above the setpoint upper limit SPuL If the setpoint will not decrease check the Program mode to see that you are not trying to decre...

Page 44: ...ll cause the display to sequence through the following series of display codes and values Display Code Description Value Pn Profile Number Actual Profile Number tr Time remaining in current Ramp or So...

Page 45: ...us is selected pressing the SCROLL key will advance the display to PLCt 11 Profile Loop PLCt Press the SCROLL key to see the Profile Loop Count Remaining Count Remaining for the last active profile 12...

Page 46: ...quired relays or SSR Drivers will be used to control the valve One output will be used to open the valve the other is used to close the valve The slidewire feedback is used to provide a signal relativ...

Page 47: ...lowing displays Po1 if output 1 is 3 4 5 6 7 then the output 1 percentage of output value Po2 if output 2 is 3 4 5 6 then the output percentage of output value Proc will be displayed then current proc...

Page 48: ...cific process however a period of 8 to 12 minutes should be allowed between changes The important point to remember is to allow the process to react completely do not rush through tuning of the contro...

Page 49: ...rve the response One easy method for imposing the upset is to move the setpoint for a few seconds and then return it to its original value 4 Achieve a response curve similiar to the sustained oscillat...

Page 50: ...PAGE 50 Curve A unstable Curve B stable Curve C continuously cycling ultimate PB and period A C B Period...

Page 51: ...ons remain active Control Display etc 3 Open the instrument door snap up the chart hold down lever on the chart flange assembly gently lift the pen s and remove old chart 4 With the pen s held up inst...

Page 52: ...alibration modes available For two pen units CAL2 and CAL 3 will only need to be preformed on TB 4 to calibrate both TB4 and TB5 inputs Both TB 4 and TB 5 inputs must be calibrated for RTD inputs Tabl...

Page 53: ...MAIN CALIBRATION This routine determines and saves calibration values which correct for component variations relating to the basic measuring function of the unit A 12 4 mVDC 01mVDC source is required...

Page 54: ...thermocoupleconnected before proceeding with calibration Operation With CAL 3 displayed press and hold the DOWN key then press the SCROLL key Release both keys and the instrument will display hoLd Con...

Page 55: ...splayed press and hold the DOWN key then press the SCROLL key The instrument will display C6 and the number of the mode in effect Press the UP or DOWN key to change the mode selection indicated by the...

Page 56: ...displayed as the pen position value is saved Then dELy will be displayed as the pen moves to about mid scale CAL9 will be displayed showing that the calibration is complete When the calibration is com...

Page 57: ...tSt4 from tSt1 Listed below in Table 5 2 are the test proce dures available Test 1 2 and 3 are performed on start up periodically during operation and on entry into the Test mode Test 4 is executed o...

Page 58: ...y then press the SCROLL key tSt1 will be displayed momentarily while the test is in progress Upon successful completion the instru ment will proceed to Test 2 5 5 2 TEST 2 EXTERNAL RAM TEST Tests the...

Page 59: ...hen the driver is off Press and release the DOWN key to advance through the following sequence DISPLAY RELAY ON SPST RELAY ON SPDT rLYA A A rLYb B B rLYC C C rLYd D D rLYE E None rLYF F None rLYg G G...

Page 60: ...5 10 TEST A COMMUNICATION HARDWARE TEST Communications Option This test allows the operator to verify that the communications hardware is functioning properly With tStA displayed press and hold the DO...

Page 61: ...tes the power that is connected to the instrument If the switch does not indicate the correct voltage reposition as necessary If the voltageis not correct check the power source 2 Turn off the instrum...

Page 62: ...t values Press the Scroll key and the display will be 0X21 Use the UP DOWN keys as necessary to adjust the last 4 digits of the number Press the SCROLL key and the power up sequence will complete The...

Page 63: ...s mADC Output s 1 Verify that the Program mode parameters are correctly malfunction set page 30 or the Software Ref Sheet page 80 if already filled out 2 Turn Off the power to the instrument Wait abo...

Page 64: ...does not affect the plastic to clean the segment if necessary 6 Verify the instrument is not in Change Chart function Error Code Displayed SnSr Sensor Break or 1 Inspect the sensor for proper operatio...

Page 65: ...l segment of the display page 52 2 If this error code appears as part of the model number during the power up sequence follow the steps listed for when the Model Number is not correct condition page 6...

Page 66: ...wn screw and swing the platen open Inspect the Processor board Appendix A 1 page 68 to insure that the input conditioning jumper JU4 is in the non volt position The jumper must be in the non volt posi...

Page 67: ...eing calibrated For TB 4 JU4 should be in the non volt position and JU6 in the RTD position For TB 5 JU5 should be in the non volt position and JU7 in the RTD position 3 Perform the CAL5 procedure as...

Page 68: ...r36 Incorrect Crystal 1 Turn off the power to the instrument wait 5 seconds For Digital Comm then turn the power on Er37 Incorrect Micro 1 Turn off the power to the instrument wait 5 seconds For Digit...

Page 69: ...K JU4 PEN 1 INPUT T C RTD VOLT mA JU5 PEN 2 INPUT T C RTD VOLT mA JU6 JU7 RTD INPUT NON RTD 230 115 VAC SWITCH 230 VAC MODEL ONLY EPROM SIZE JU8 RAM SIZE LOCKED JU1 ENABLE MODE REVERSE OF JU4 JU8 JU6...

Page 70: ...ated when the relay is off To cure the problem cut the snubber resistor for the output that is being affected Connect a 01 mf 1KV capacitor from the odd numbered terminal to ground Resistor Relay R1 R...

Page 71: ...use the output to appear to be activated when the relay is off To cure the problem cut the snubber resistor for the output that is being affected Resistor Relay R1 Relay A N O R2 Relay A N C R3 Relay...

Page 72: ...72 FIGURE A 4 Current Output Board TB10 TB11 TB12 TB13 U1 U3 U2 U5 U4 U7 U6 U9 U8 R50 R51 R52 R53 If this option board was ordered you will find it located in the lower right hand corner of the instru...

Page 73: ...d together before updating the displayed and recorded value The factory default value is 1 no filtering Display code dFF Dry Bulb Is the temperature sensor connected to TB4 that provides the ambient t...

Page 74: ...ssion Output Allows re transmission of the process variable Factory default is 0 not selected Display code Pout If selected must be assigned to a current output and scaled using Process Output upper a...

Page 75: ...ion 4 3 Factory default is 0 0 Display code rt1 rt2 Relative Humidity Stated as a percentage Relative Humidity is the ratio of water vapor that is present in the air to the maximum water vapor that th...

Page 76: ...Compliance Voltage 1 115VAC 2 115 230VAC CSA Approved 4 115VAC input 5 115 230VAC Enclosure Option 2 Standard Cover Plastic Windows 4 Door Lock 6 Sealed Conduit Conn 7 Combination 4 6 Communications 0...

Page 77: ...5 dB minimum at 60 Hz or greater Common mode 90 dB minimum 115 VAC maximum Line Voltage 115 230 VAC 10 50 60 Hz Power Consumption 25 VA maximum Operating Temperature 32 degrees to 131 degrees F 0 degr...

Page 78: ...ll be dependent upon the quality of the sensors used the proper installation of the sensors the input correction adjustments and the barometric pressure adjustments Warranty 3 years see back cover for...

Page 79: ...disabled Auto Manual Bumpless transfer from automatic to manual Manual Output 0 to 100 ALARM ADJUSTMENTS Process Alarm 9999 to 9999 units Deviation Alarm 3000 to 3000 units Deviation Band Alarm 1 to 3...

Page 80: ...9 seconds over chart span Accuracy 1 0 of chart span max error from displayed value Chart Rotation Accuracy 0 5 of Chart Rotation Time DIGITAL COMMUNICATIONS Type RS 485 serial communications port Ha...

Page 81: ...1 iCi1 iSi2 iCi2 PEnS rHC AL1 AL2 dPoS Euu EuL HyAo Prnd dFF Pout Pou PoL Cru CrL PAEC PROGRAM MODE Pen 1 Pen 2 unit rLyA rLyb rLyC rLyd rLyE rLyF rLyg rLyh CurA Curb CurC Curd CoAr Cobr CoCr Codr Crt...

Page 82: ...Lyd rLyE rLyF rLyg rLyh CurA Curb CurC Curd CoAr Cobr CoCr Codr Ptb PiA rrh PPC Crt PAPu Coo CCon CbS CAd1 CAd2 PROGRAM MODE Pen 1 Pen 2 unit TUNE MODE Pen 1 Pen 2 SoP PAL1 dAL1 bAL1 PAL2 dAL2 bAL2 Pb...

Page 83: ...ru dhrd Pend P2 S1 S2 S3 S4 S5 S6 rt SP1 SP2 E1 E2 E3 E4 E5 E6 St E1 E2 E3 E4 E5 E6 PLCt dhru dhrd Pend P3 S1 S2 S3 S4 S5 S6 rt SP1 SP2 E1 E2 E3 E4 E5 E6 St E1 E2 E3 E4 E5 E6 PLCt dhru dhrd Pend P4 S1...

Page 84: ...ru dhrd Pend P6 S1 S2 S3 S4 S5 S6 rt SP1 SP2 E1 E2 E3 E4 E5 E6 St E1 E2 E3 E4 E5 E6 PLCt dhru dhrd Pend P7 S1 S2 S3 S4 S5 S6 rt SP1 SP2 E1 E2 E3 E4 E5 E6 St E1 E2 E3 E4 E5 E6 PLCt dhru dhrd Pend P8 S1...

Page 85: ...he application Fill out the setpoint scale along the left side of the worksheet For dual pen profile controller be sure to scale the setpoint range for the greater range Remember that the profile ramp...

Page 86: ...Time Time Time Time Time Time Time Time Time Time 1 2 3 4 5 6 Setpoint Scale Event 1 Event 2 Event 3 Event 4 Event 5 Event 6 Profile End Action Profile Loop Count Deviation Hold After Ramp Up Deviatio...

Page 87: ...play Keystroke Pn SCROLL X DOWN 1 SCROLL Sn SCROLL X UP 6 SCROLL rt SCROLL X UP DOWN 0 10 SCROLL SP SCROLL X UP Down 100 SCROLL St SCROLL X UP DOWN 0 10 SCROLL rt SCROLL X UP DOWN 0 10 SCROLL SP SCROL...

Page 88: ...epting only the cost or expense of repair or replacement as described above Products must be installed and maintained in accordance with Partlow instructions Users are responsible for the suitability...

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