Parker Hauser COMPAX 25 S F1 Series User manual

COMPAX-M/S - RS485 - Option (F1, F5)
Subject to technical change. Data represents the technical status at the time going to the press. 08.12.00 13:17 192-040026 N5
Operating Instructions
RS485 - Option (F1, F5)
For software versions V1.20 September 97
We automate motion
DIN EN ISO 9001
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Reg. Nr. 36 38
Parker Hannifin GmbH
EMD HAUSER
Robert-Bosch-Str. 22
D-77656 Offenburg, Germany
Phone: +49 (0)781 / 509-0
Fax: +49 (0)781 / 509-176
http://www.parker-emd.com
Parker Hannifin plc
EMD Digiplan
21 Balena Close
Poole, Dorset. BH17 7DX UK
Phone: [phone] / 69-9000
Fax: [phone] / 69-5750
http://www.parker-emd.com
Bus User Guide

COMPAX-M/S - RS485 - Option
2
Table of contents
1. Description of the RS485-interface ..............................2
2. RS485-Bus...................................................................3
2.1 Bus wiring .............................................................3
2.1.1 RS485 master at option F5..........................3
2.1.2 Via RS232-converter and option F1 - ..........4
2.1.3 Position plan of the cables...........................5
3. Device settings.............................................................6
3.1 Device address.....................................................6
3.2 Baud rate ..............................................................6
3.3 RS485 operating mode.........................................6
3.3.1 Adjustment of operation mode at ASCII -
transmission .................................................6
3.3.2 Adjustment of field-bus protocol by option F56
3.3.3 Block-Check Character (BCC).....................6
3.3.4 Timeout monitoring ......................................6
4. Transmission protocol ..................................................7
4.1 Frame format for transmitting from PC to
COMPAX ..............................................................7
4.2 Meaning of the various trans-mission elements...7
4.3 Frame format of the COMPAX response .............7
4.4 Binary data transmission via RS485 ....................8
4.4.1 Meaning of the binary command code.........8
4.5 Program examples ...............................................9
4.5.1 BASIC program with BCC............................9
4.5.2 BASIC program without BCC.....................10
5. Parameters for the RS485 interface...........................11
6. Special error messages relating to the RS485 interface11
This documentation applies to the following devices:
!COMPAX 25XXS with option F1 or F5
!COMPAX 45XXS with option F1 or F5
!COMPAX 85XXS with option F1 or F5
!COMPAX P1XXM with option F1, or F5 without option N1
!COMPAX 02XXM with option F1 or F5
!COMPAX 05XXM with option F1 or F5
!COMPAX 15XXM with option F1 or F5
"XX": any version number
"F1/F5": RS485 option
"N1": single-phase supply (not possible in combination
with F1)
Key to device designation:
e.g.: COMPAX 0260M:
COMPAX:Name
02: rated power class
60: version, e.g. "00" = standard device
M: device type where "M" = multi-axes device and
"S" = single-axis device
HAUSER-name-plate
The name-plate is located on the top of the device and
comprises:
1. Description of the RS485-
interface
You can, via the RS232 interface of a industrial computer
and an RS232-RS485 bus converter, communicate with up
to 31 COMPAX devices. The following functions are
supported:
!direct command input and execution in on-line mode,
!reading out status values,
!reading and writing program blocks (full command set
available),
!reading and writing parameters, and
!transmission of control statements.
Interface parameter of the ASCII protocol:
Interface: F1: 4 wire for RS232-master
via RS232/RS485 -
converter.
F5: 2 wire - RS485
Baud rate: 150 up to 115200, set by
parameter P195
Maximum line
length:
1,2 kilometers
Devices on bus: up to 31 COMPAX devices can be
connected
Address: set by parameter P194
Character length: 8 bits
Start bit: 1 bit
Stop bit: 1 bit
Parity: none / even / odd, set by
parameter P196
Hardware
handshake:
no
Software
handshake:
XON/XOFF, set by parameter
P196
Timeout monitoring can be activated, by parameter
P196
Block-Check
Character (BCC)
can be activated, improves
transmission reliability
Input buffer: command string, maximum 40
characters
Output buffer: status string, maximum 40
characters
Data format: ASCII, except for BCC
End-of-text
character (ETX):
CR: carriage return (0D hex)

3
2. RS485-Bus
2.1 Bus wiring
plug assignment of RS485-bus
COMPAX S: X5 / X7
NMD: X6 / X7
option F5
COMPAX -
GND
X7/3
X7/7
X7/2
X5(6)/7
X5(6)/2
RxD/TxD
COMPAX -
GND
RxD/TxD
RxD/TxD
RxD/TxD
COMPAX S (NMD)
RE
DE
option F1
COMPAX -
GND
X7/3
X7/7
X7/2
X5(6)/7
X5(6)/2
COMPAX S (NMD)
COMPAX -
GND
TxD
TxD
X7/6
X7/1
X5(6)/6
X5(6)/1
RxD
RxD
TxD
TxD
RxD
RxD
2.1.1 RS485 master at option F5
RS 485
ΗΑΥΣΕΡ
ΠΟΩΕ Ρ ΣΥΠ ΠΛΨ
Ξ6 Ξ7
Ξ8
Ρε α δ ψ Ερρορ
ΡΣ485ΙΝ ΟΥΤ
Χοντρολ
ΗΑΥΣΕΡ
ΧΟ ΠΑΞ−
∆ΙΓΙΤΑ Λ
Στατυ σ Νυµ βερ
Ξ6
Ξ8 Ξ10
−+Εντερ
Ρεαδψ Ερρορ
ΡΣ232
Ινπυτ
Ουτπυτ
Τεστ
Χοντρολ
Ξ9 Ξ11
ςαλυε
ΗΑΥΣΕΡ
ΧΟ ΠΑ Ξ−
∆ΙΓΙΤΑΛ
Στατυσ Νυµβερ
Ξ6
Ξ8 Ξ10
−+Εντερ
Ρε α δ ψ Ερρορ
ΡΣ232
Ινπυτ
Ουτπυτ
Τεστ
Χοντρολ
Ξ9 Ξ11
ςαλυε
ΗΑΥΣΕΡ
ΧΟ ΠΑΞ−
∆ΙΓΙΤΑ Λ
Στατυσ Νυµβερ
Ξ6
Ξ8 Ξ10
−+Εντερ
Ρεαδψ Ερρορ
ΡΣ232
Ινπυτ
Ουτπυτ
Τεστ
Χοντρολ
Ξ9 Ξ11
ςαλυε
ΗΑΥΣΕΡ
ΧΟ ΠΑΞ−
∆ΙΓΙΤΑΛ
Στατυσ Νυµβερ
Ξ6
Ξ8 Ξ10
−+Εντερ
Ρε α δ ψ Ερρορ
ΡΣ232
Ινπυτ
Ουτπυτ
Τεστ
Χοντρολ
Ξ9 Ξ11
ςαλυε
SSK13/..
COMPAX-S
Status Numbe r
X6
X8 X10
-+Enter
Ready Error
RS232
Input
Output
Test
Control
X9 X11
Value
HAUSER
COMPAX-S
Status Numbe r
X6
X8 X10
-+Enter
Ready Error
RS232
Input
Output
Test
Control
X9 X11
Value
HAUSER
Siemens SPS Siemens SPS Siemens SPS Siemens SPS
X1 X2
24 V
GND
ERDE
RS 485
RS 485
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
SPS
NMD CPXM with Option F5
CPX S with option F5
CPX S with option F5
X6 IN X7 OUT
X5 IN X7 OUT
X5 IN X7 to further
bus subscribers
Within a system group of COMPAX M and a power
module, the CAN-bus-signals are transmitted via the
already existing ribbon cable connection.
possible connections with SSK13/..:
!power module X7 (OUT) →power module X6 (IN)
!power module X7 (OUT) →COMPAX S X5 (IN)
!COMPAX S X7 (OUT) →power module X6 (IN)
!COMPAX S X7 (OUT) →COMPAX S X5 (IN)
bus termination option F5
the last device of the bus system must be terminated by a
resistor in order to guarantee interference-free operation.
F5: 120Ωand 10nF between X7/2 and X7/7 at power module
or at COMPAX S.
1
5
6
9
9 pin sub-D male plug-connector
9 pin sub-D case
X7
RxD/TxD 120Ω
2
7
10nF
RxD/TxD

COMPAX-M/S - RS485 Option
4
2.1.2 Via RS232-converter and option F1
RS 485
HAUSER
POWERSUPPLY
X6 X7
X8
Ready Error
RS485IN OUT
Control
HAUSER
COMPAX-M
DIGITAL
Status Number
X6
X8 X10
-+Enter
Rea d y Error
RS232
Input
Output
Test
Control
X9 X11
Value
HAUSER
COMPAX-M
DIGITAL
Status Nu m ber
X6
X8 X10
-+Enter
Ready Error
RS232
Input
Output
Test
Control
X9 X11
Value
HAUSER
COMPAX-M
DIGITAL
Status Number
X6
X8 X10
-+Enter
Rea d y Error
RS232
Input
Output
Test
Control
X9 X11
Value
HAUSER
COMPAX-M
DIGITAL
Status Number
X6
X8 X10
-+Enter
Ready Error
RS232
Input
Output
Test
Control
X9 X11
Value
SSK13/..
COMPAX-S
Status N um ber
X6
X8 X10
-+Enter
Ready Error
RS232
Input
Output
Test
Control
X9 X11
Value
HAUSER
COMPAX-S
Status N um ber
X6
X8 X10
-+Enter
Ready Error
RS232
Input
Output
Test
Control
X9 X11
Value
HAUSER
Siemens SPS Siemens SPS Siemens SPS Siemens SPS
X1 X2
24 V
GND
ERDE
RS 485
RS 232
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
SPS
NMD CPXM with option F1
CPX S with
option F1
CPX S with
option F1
RS232
X2
H1
5VDC
AC/ DC
X1
Poweron RS 485
AC/ DC
Power
SSU
RS232 - RS485-
converter SSU1
SSK13/..
X6 IN X7 OUT
X7 OUT
X5 IN
X5 IN X7 to further
bus subscribers
In a system group comprising a number of COMPAX
devices and a power module (NMD), the RS485
signals are transferred over the already existing
ribbon-cable connections.
possible connections with SSK13/..:
!converter SSU1 →power module X6 (IN)
or
!converter SSU1 →COMPAX S X5 (IN)
!power module X7 (OUT) →power module X6 (IN)
!power module X7 (OUT) →COMPAX S X5 (IN)
!COMPAX S X7 (OUT) →power module X6 (IN)
!COMPAX S X7 (OUT) →COMPAX S X5 (IN)
bus termination option F1
In order to guarantee interference-free operation, the last
device of the bus system must be terminated by 2 resistors.
F1: 120Ωand 10nF between X7/1 and X7/6 and X7/2 and
X7/7 at power module or at COMPAX S.
RS232 - RS485-converter: SSU1/01
1
5
6
9
9 pin sub-D male plug-connector
9 pin sub-D case
X7
RxD 1
120Ω
2
7
6
10nF
RxD
TxD
TxD
120Ω
10nF
RS 232
X2
H1
5V DC
AC/DC
X1
Power on RS 485
AC / DC
Power
SSU
56
85
170 182
46
Attention!
The converter can only be used together with option
F1 (4 wire)!
plug assignment SSU1/01
SSU1/01
X1/1
RxD X2/2
X1/6
TxD X2/3
X1/2
DTR X2/4
X1/7
DSR X2/6
X1/3
GND X2/5
RTS X2/7
CTS X2/8
X2/9
X3 X4
/1 /2 /3 /4 /1 /2 /3
230V 110V N PE +24V 0V PE
+5V
TxD
TxD
RXD
RXD
GND
RS232 RS485
Fixing: 3 screws M4.
the converter is fed via a power line (3m) by 230V AC.
the power supply can be adjusted to 110 V AV and 24 V DC.
. For doing this, the housing must be opened and the feed
lines have to be clamped as follows:
230V AC: X3/1 (L1); X3/3 (N) X3/4 (PE) (standard)
110V AC: X3/2 (L1); X3/3 (N) X3/4 (PE)
24V DC: X4/1 (+24V); X4/2 (0V) X4/3 (PE)

5
2.1.3 Position plan of the cables
position plan of the cables: SSK1
from RS232 - RS485 - converter to PC
PC / terminal
9-way Sub-D-pin
plug shell with screwed
connection UNC4-40
9pol. Sub-D-socket board
housing
GND
housing
GND
7 x 0,25mm + shield
2
2
3
4
6
5
7
8
RxD
TxD
DTR
DSR
RTS
CTS
2
3
4
6
5
7
8
RxD
TxD
DTR
DSR
RTS
CTS
9+5V
1n.c.
1
5
6
9
1
5
6
9
X6
position plan of the cables: SSK13
converter i.e.. COMTAC to power module and power module
to power module
NMD X7 /
COMPAX S X7
SSU1 X1
NMD X6 /
COMPAX S X5
1
6
2
7
case
RxD
TxD 1
6
2
7
case
RxD
TxD
SSK 13/..
1
5
6
9
RxD
TxD
RxD
TxD
1
5
6
9
33
RS485
-GND
5 x 0,25mm + shield
2
5
9
9 pin sub D
male plug-connector, casing
with UNC4-40 screw
connections
UNC4-40 screw connections
socket-connector, casing with
9 contact sub-D female
CPX
-GND

COMPAX-M/S - RS485 Option
6
3. Device settings
The RS485 interface supports a number of functions with selectable settings. These are set by means of definable parameters.
3.1 Device address
The device address on each COMPAX can be set by means
of parameter P194.
The range is 0: 31, where "0" is the default setting. Before
putting any COMPAX device into operation, an address from
1 to 31 must be set.
3.2 Baud rate
The baud rate on each COMPAX can be set by means of
parameter P195. The range is 150 - 115200 bit/s.
Important: In all devices connected, the same baud
rate must be set.
3.3 RS485 operating mode
3.3.1 Adjustment of operation mode at
ASCII - transmission
to be adjusted via parameter P196
function adjustment valence
handshake: none:
with XON/XOFF
0
1
parity: none:
with:
odd:
even:
0
2
0
4
block-check-
character:
none:
with:
0
8
time-out-
supervision:
none:
with:
0
16
end-sign of
COMPAX-reply
CRLF>
CR
0
32
COMPAX - reply without address
with preceding address
of COMPAX
0
64
The desired adjustment can be carried out by entering the
valence sum into parameter P196.
3.3.2 Adjustment of field-bus protocol by
option F5
In order to be able to communicate with COMTAC, the field-
bus protocol must be adjusted. . For doing this, please set
P196 = 164.
Reference during an application with COMTAC, field-bus
(option F5) and COMPAX:
Previous adjustment: P196=164
When using
!F5 (2 wire-RS485) Software ≥V1.22 and
!COMPAX - Version > V2.0
P196 has to be adjusted to 165.
Baudrate
At field-bus operation, 4 different baud rates (to be adjusted
via P195) are possible:
!28 800 baud
!57 600 baud
!172 800 baud
!345 600 baud
3.3.3 Block-Check Character (BCC)
A byte-by-byte logical XOR of all characters in a transmission up
until - but excluding - the CR(0D hex) is sent after the last
character; (CRin the direction from PC to COMPAX, and the
prompt in the direction from COMPAX to IPC). This performs an
additional check on the transmitted data.
If the BCC function has been activated, COMPAX performs a
block check, and reports any detected transmission errors in
the form of error message E72. This error message does not
have to be acknowledged; you simply send the same
message again. If the BCC is error-free, COMPAX
acknowledges the error message itself.
3.3.4 Timeout monitoring
As soon as COMPAX is activated via the assigned address, a
time monitoring check is performed. For a definite period
(namely the transmission time required for five characters),
COMPAX awaits receipt of the next character. If COMPAX does
not receive this character, it generates error message E73.
This error message does not have to be acknowledged; you
simply send the same message again. If transmission is
error-free, COMPAX acknowledges the error message itself.
If the BCC function has been activated, timeout monitoring is
performed up until the BCC, and otherwise right up until the
last character.

7
4. Transmission protocol
Transmission via the RS485 interface takes place in ASCII
format (American Standard Code for Information
Interchange), the same as via the COMPAX's RS232
interface, i.e. all transmitted characters are genuinely
representable ASCII characters - with the exception of CR,
LF, XON/XOFF, and the Block-Check Character (BCC).
4.1 Frame format for transmitting
from PC to COMPAX
Necessary data Optional extra characters
Device address
Command code or execute
character ("!" ≡21 hex)
Buffer character ("," ≡2C hex)
No ackn. character ("/" ≡2F hex)
Echo character ("?" ≡3F hex)
End-of-text character
("CR"≡0Dhex)
Block-Check Character BCC
4.2 Meaning of the various trans-
mission elements
Device address: Possible settings are from 1 to 32.
It is possible, by means of address 32
(broadcast address), to address all connected
devices simultaneously. The addressed
devices, however, do not send a reply.
Command code:The possible commands and their
functions are explained in detail in the
COMPAX-M Operating Instructions, in the
description of the RS232 interface, in the
Section "Interface functions".
Execute: character "!" ≡21 hex.
When this character is sent, a command
previously stored in the buffer is executed.
When transmitting, you can send either a command
code or the execute character.
Buffer: (character "," ≡2C hex)
If this character is appended to a command
code, the command in question will not be
executed immediately; it will be stored in the
COMPAX buffer.
No acknow- (character "/" ≡2F hex)
ledgement: If this character is appended to a command
code, COMPAX will not send a reply or
acknowledgement.
Echo: (character "?" ≡3F hex)
If this character is appended to a command
code, COMPAX will send the received data
back in full, completing the return transmission
with CRLF>.
End-of-text : (character "CR" ≡0D hex)
"CR" indicates the end of the character string
being transmitted.
BCC If the BCC function has been activated, you
must, in this position, transmit the byte-by-byte
logical XOR of the characters you have
transmitted (up until but not including CR).
It is possible, for the purposes of particularly time-critical
applications, to transmit a series of commands in COMPAX's
specific binary form. Time can be saved by thus omitting the
format conversion from ASCII to COMPAX-internal binary.
Transmission in normal ASCII format is, even in these
circumstances, still possible (i.e. mixed mode).
4.3 Frame format of the COMPAX
response
Transmission, if error-free, is concluded with:
!CRLF>
or
!the desired reply and CRLF> BCC
(BCC only if this function has been activated)
Transmission, if subject to error, is concluded with:
!Exx CRLF> BCC
(BCC only if this function has been activated)
where "Exx" = error message resulting from detected error
As first part of the reply there will be sent, if adjusted
via P196, the address of the answering device.

COMPAX-M/S - RS485 Option
8
4.4 Binary data transmission via RS485
As far as time-critical applications are concerned it is possible to transmit certain commands in the internal COMPAX binary
format. By leaving out the format conversion from ASCII to the binary format, time can be saved; nevertheless, transmission in
the normal ASCII-format is still possible (mixed operation)
At binary data transmission the frame format changes when transmitting from PC to COMPAX:
necessary data characters that can be added
optionally.
device address
(ASCII-format)
binary command code
block-check-character BCC
!Please note that the device address will still be
transmitted in ASCII-format!
!The end-sign may not be sent!
!The binary format has always to be transmitted
in its whole length!
4.4.1 Meaning of the binary command code
command binary format (hexadecimal) number formats
POSA value 88 41 xx xx xx xx xx xx
LSB MSB
number formats of "xx xx xx xx xx xx" *2
3 byte of places behind/ 3 byte of places in front
of the decimal point.
POSR value 88 52 xx xx xx xx xx xx
LSB MSB
valence:
2-24 2-23 ... 2-2 2-1 , 202122... 222 223
SPEED value 88 53 xx xx xx xx xx xx
LSB MSB
transmission order.e.g.: "88 41 LSB....MSB"
ACCEL value 84 4C yy yy
MSB LSB number formats of "yy yy"
ACCEL- value 84 44 yy yy
MSB LSB
2 byte of places in front of the decimal point.
no places behind the decimal point.
OUTPUT Ayy=0 85 4F yy yy 30
MSB LSB
valence: * 1
215 214 ... 22 2120.
OUTPUT Ayy=1 85 4F yy yy 31
MSB LSB
transmission order e.g..: "84 4C MSB LSB".
POSR value OUTPUT Ayy=0 8C 52 xx xx xx xx xx xx 4F yy yy 30
LSB MSB MSB LSB
POSR value OUTPUT Ayy=1 8C 52 xx xx xx xx xx xx 4F yy yy 31
LSB MSB MSB LSB
POSR value1 SPEED value2 8F 52 xx xx xx xx xx xx 53 xx xx xx xx xx
xx
LSB MSB LSB MSB
*1 Negative numbers
!Negative numbers are shown in a two's complement. -
Formation of a two's complement:
!the bit combination of the positive numerical value has to
be determined.
!the binary value must be negated.
!there has to be added "1".
*2 Format transformation
Out of any optional number disposing of places behind the
decimal point, you can generate this format as follows:
example: number = 450,5
1. Number to be multiplied by 224
450,5* 224 =7558135808.
2. 8388608 to be changed into a hexadecimal number (possibly
change into integer before) => .0x00 01 C2 80 00 00 ≡places in
front of the decimal point,
places behind the decimal point ≡MSB,.... LSB, MSB,.... LSB.
3. These bytes have now to be filled into the command in the indicated
order. The order of bytes is reversed. The order of bits is not allowed
to be reverserd.
This conversion is also valid for negative numbers.
Example for the number format of xx xx xx xx xx xx"
number MSB LSB
10 00 00 0A 00 00 00
256 00 01 00 00 00 00
400,5 00 01 C2 80 00 00
-1 FF FF FF 00 00 00
places in front of
the decimal point
places behind the
decimal point
For POSA 256,0 you get the following string:
"88 41 00 00 00 00 01 00"
Please note, that all places have to be transmitted

9
4.5 Program examples
In the following examples, the PC reads status S1 from two COMPAX devices, for which the following parameters have
previously been set:
Device 1: P194 = 1 P195 = 9600bit/s Device 2: P194 = 5 P195 = 9600bit/s
4.5.1 BASIC program with BCC
!P196 = 8 in both devices
OPEN "com2:9600,N,8,1" FOR RANDOM AS #1----- Initialization of interface as #1 (channel 1)
com2: serial interface COM2
9600: 9600 baud transmission rate
N: no parity bit
8: 8 bit word length
1: 1 stop bit
text$ = "1S1" ---------------------------------------------------- device 1 is to be interrogated for status 1
GOSUB output ------------------------------------------------- calls up subprogram "Output"
GOSUB read---------------------------------------------------- calls up subprogram "Read"
PRINT text$ ----------------------------------------------------- outputs read value to screen
text$ = "5S1" ---------------------------------------------------- device 5 is to be interrogated for status 1
GOSUB output ------------------------------------------------- calls up subprogram "Output"
GOSUB read---------------------------------------------------- calls up subprogram "Read"
PRINT text$ ----------------------------------------------------- outputs read value to screen
END --------------------------------------------------------------- program end
output: ------------------------------------------------------------ start of subprogram "Output"
bcc = 0------------------------------------------------------------ bcc is set to 0
FOR a = 1 TO LEN(text$) ----------------------------------- loop performed for each character in text$
bcc = bcc XOR ASC(MID$(text$, a, 1)) ----------------- XOR operation on all characters to bcc
NEXT a ----------------------------------------------------------- end of loop
PRINT #1, text$ ------------------------------------------------ text$ is output with concluding CRto #1
PRINT #1, CHR$(bcc); --------------------------------------- BCC in bcc is output as character without CRto #1
RETURN --------------------------------------------------------- branch back to main program
read:--------------------------------------------------------------- start of subprogram "Read"
INPUT #1, text$ ------------------------------------------------ value is read from #1 to text$
a$ = INPUT$(2, 1) --------------------------------------------- characters LFand ">" are read from #1
bbcc = 0 ---------------------------------------------------------- bbcc is set to 0
FOR a = 1 TO LEN(text$) ----------------------------------- loop performed for each character in text$
bbcc = bbcc XOR ASC(MID$(text$, a, 1))--------------- XOR operation on all characters to bbcc
NEXT a ----------------------------------------------------------- end of loop
ebcc = ASC(INPUT$(1, 1))---------------------------------- BCC is read from #1 to ebcc
IF ebcc = bbcc THEN RETURN---------------------------- BCC read into ebcc is compared with
calculated BCC in bbcc; if values are same,
branch back to main program
PRINT "Transmission error !!!" ----------------------------- error message output on screen
RETURN --------------------------------------------------------- branch back to main program

COMPAX-M/S - RS485
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4.5.2 BASIC program without BCC
!P196 = 0 in both devices
OPEN "com2; 9600,N,8,1" FOR RANDOM AS #1-----Initialization of interface as #1 (channel 1)
com2: serial interface COM2
9600: 9600 baud transmission rate
N: no parity bit
8: 8 bit word length
1: 1 stop bit
text$ = "1S1" ----------------------------------------------------device 1 is to be interrogated for status 1
GOSUB output -------------------------------------------------- calls up subprogram "Output"
GOSUB read ---------------------------------------------------- calls up subprogram "Read"
PRINT text$ -----------------------------------------------------outputs read value to screen
text$ = "5S1"-----------------------------------------------------device 5 is to be interrogated for status 1
GOSUB output -------------------------------------------------- calls up subprogram "Output"
GOSUB read ---------------------------------------------------- calls up subprogram "Read"
PRINT text$------------------------------------------------------ outputs read value to screen
END----------------------------------------------------------------program end
output: -------------------------------------------------------------start of subprogram "Output"
PRINT #1, text$------------------------------------------------- text$ is output with concluding CRto #1
RETURN---------------------------------------------------------- branch back to main program
read: ---------------------------------------------------------------start of subprogram "Read"
INPUT #1, text$------------------------------------------------- value is read from #1 to text$
a$ = INPUT$(2, 1)----------------------------------------------characters LFand ">" are read from #1
RETURN---------------------------------------------------------- branch back to main program

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5. Parameters for the RS485 interface
No. Meaning Units Minimum Default Maximum Valid from
Parameters for the start-up of the RS485 interface
P194 Device address 0 0 31 power-on
P195 Baud rate bit/s 150 9600 115200 power-on
at fieldbus protocol (P196 = 164/165) bit/s 28800 •57600 •172800 •345600
P196 Operating mode 0 0 31 power-on
6. Special error messages relating to the RS485 interface
No. Cause Measures per cause Ackn. Drive
disabled
E70 Parity error Retransmit characters 1no
E71 COMPAX buffer overflow; Retransmit
more than 40 characters sent with
fewer characters
Retransmit with fewer characters 1no
E72 Block-Check Character error Retransmit characters 1no
E73 Timeout error Retransmit characters 1no
E74 BUSY error power
on
no
1 No acknowledgement is needed; the error message will be erased automatically with the next error-free transmission.

COMPAX-M/S - RS485
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