RKC MA900/901 communication driver is the driver to communicate with Multi-Point Digital controller of RKC Instrument Corp., in Japan.
And it is composed of 4(MA900) or 8(MA901) channel.
<Figure 1> is read setting example of MA900/901 communication driver.
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| <Figure 1> Read setting example of RKC MA900/901 communication driver |
Device part of <Figure 1> input Com Port(COM1), Baud Rate(9600), Parity Bit(0), Data Bit(8), Stop Bit(1) respectively according to setting of controller.
In case of directly connecting control panel to control unit, set '0' at option part of communication setting. And in case of doing not direct connection, enter as '1'.
RKC MA900/901 driver's read schedule
Read schedule setting parameters are as follows :
1) STATION – STATION number set at controller(0000~9999).
A number in the thousands, a number in the hundreds : Panel number.
A number in the tens, a number in the one digit : Unit number.
2) Read Type – Input memory type. Refer to <Table 1> or MA900/901 manual.
3) Read start address – Don't care.
4) Save Start Address for Communication Server – readed data saving start address of communication server.
5) Read Size – Fixed to 1.
Reference) MA900 device has 4 channels, and MA901 has 8 channels.
Read schedule example)
| READ | STATION | Read Type | Read Start Address | Memory Save Address | Read Size(Fixed to 1) |
| FLOAT, | 1, | M1, | 0, | 0, | 1, |
| FLOAT, | 1, | O1, | 0, | 10, | 1, |
| FLOAT, | 1, | O2, | 0, | 20, | 1, |
| FLOAT, | 1, | S1, | 0, | 30, | 1, |
| FLOAT, | 1, | P1, | 0, | 40, | 1, |
| READ, | 1, | AA | 0, | 0, | 1 |
| READ, | 1, | AB | 0, | 10, | 1 |
<Table 1> is part of memory area possible to be used at RKC MA900/901.
| Area | Data Type |
Remarks |
| M1 | Measured Value : PV |
Read only |
| M2 | Current Transformer 1 Input Value |
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| M3 | Current Transformer 2 Input Value |
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| MS | Set Value Monitor |
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| AJ | Output Status |
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| AA, AB, AC | Alarm 1, 2, 3 Status |
0:OFF, 1:ON, Read only |
| B1 | Burnout |
0:OFF, 1:ON, Read only |
| O1 | Manipulated Output Value |
Read only |
| O2 | Cool-Side Manipulated Output Value |
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| ER | Error Code |
0 ~ 255, Read only.. |
| SR | RUN/STOP Function |
0:OFF, 1:ON, Read/Write |
| S1 | Set value(SV) |
SV Setting Value, Read/Write |
| A1, A2, A3 | Alarm 1, 2 Setting |
Read/Write |
| P1 | Heat-side proportional band |
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| I1 | Integral time |
1~3600 sec(0:PD control), Read/Write |
| D1 | Derivative time |
1~3600 sec(0:PI control), Read/Write |
| T0 | Heat-side proportioning cycle |
1~100 sec, Read/Write |
| P2 | Cool-side proportioning band |
1~1000% sec, Read/Write |
| V1 | Deadband |
Temp Input :-10~10, Read/Write |
| T1 | Cool-side proportioning cycle |
1~100 sec, Read/Write |
| … | … |
… |
| <Table 1> Part of memory area possible to be used at RKC MA900/901(Refer to MA900/901 manual about detailed area type) | ||
Write to direct address of controller, regardless of SCAN File.
Digital Write
Digital write setting parameters are as follows :
1) PORT Connected PORT number(0 ~ 255)
2) Station Station number 0000 ~ 9999.
A number in the thousands, a number in the hundreds : Panel number,
A number in the tens, a number in the one digit : Unit number.
3) ADDRESS Channel number 1 ~
4) Extra1 Memory area Refer to <Table 1> or MA900/901 manual.
5) Extra2 Channel classification Enter 100 to memory(SR, IN memory etc) without channel classification, enter 1 in case of digital output memory(Q4 etc).
Write example 1)
Port:0, Station:1, Address:0001, Extra1:SR, Extra2:100
The setting parameter shown above is example for RUN/STOP the RKC MA900/901 device.
Analog Write
Analog write setting parameters are as follows :
1) PORT Connected PORT number(0 ~ 255)
2) Station Station number 0000 ~ 9999.
A number in the thousands, a number in the hundreds : Panel number.
A number in the tens, a number in the one digit : Unit number.
3) ADDRESS Channel number 1 ~
4) Extra1 Memory area Refer to <Table 1> or MA900/901 manual.
5) Extra2 Channel, all and the number of digits of decimal point
3 digits number : 1 = Memory without channel classification(SR, IN etc), 0 = Channel classification memory(MI, S1 etc).
2 digits number : 1 = Memory which outputs as 1 digit(AA, AB etc), 0 = Memory which outputs as 6 digits(S1, P1, P2 etc).
1 digit number : 0 = Memory without decimal point(AA, AB etc), 1 = Memory for 1 digit of decimal point(ON, V1 etc), 2 = Memory for 2 digits of decimal point(PB etc), 3 = Memory for 3 digits of decimal point(KG etc).
Write example 1)
Port:0, Station:1, Address:0003, Extra1:S1, Extra2:1
The setting parameter shown above is setting SV value example for 3 channel RKC MA900/901 device.
Write example 2)
Port:0, Station:1, Address:0002, Extra1:I1, Extra2:0
The setting parameter shown above is setting Integral time example for 2 channel RKC MA900/901 device.
Connection of main power
Connect AC 100 ~ 240V to power part of <Figure 2>.
<Figure 2> is appearance of connecting power and communication cable to RKC MA900/901 device.
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| <Figure 2> Appearance of connecting power and communication cable to RKC MA900/901 device |
Connection of RS-422A communication cable
Connect Tx-, Tx+, Rx-, Rx+ terminal of computer to no.45 ~ no.48 of <Figure 2>.
MA900/901 side Computer side( RS-485 converter etc)
No.45 T(A) ------------------------------------------ Tx-
No.46 T(B) ------------------------------------------ Tx+
No.47 R(A) ------------------------------------------ Rx-
No.48 R(B) ------------------------------------------ Tx+
<Figure 3> is appearance of RKC MA901 device.
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| <Figure 3> Appearance of RKC MA901 device |
RKC MA900/901 device can set baud rate, station and etc by using control switch of front panel(Refer to <Figure 3>).