Allen-Bradley SLC 500 BASIC User manual

Publication 1746-IN009B-EN-P - August 2005
Installation Instructions
SLC 500 BASIC and BASIC-T Modules
Catalog Numbers 1746-BAS and 1746-BAS-T
Inside . . .
For See Page
Important User Information 2
Hazardous Location Considerations 3
Environnements dangereux 3
About the BASIC and BASIC-T Modules 4
Before You Begin 5
Install the 1746-BAS Module and 1746-BAS-T
Module
12
Wire the PRT1 and PRT2 Communication Ports 13
Wire to the DH485 Port 18
Apply Power to your BASIC Module and
BASIC-T Modules
19
Configure the BASIC Module and BASIC-T
Module
19
Battery Replacement, Handling, Storage, and
Transportation (Cat. No. 1747-BA)
20
Specifications 24
Additional Resources 26

2SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Important User Information
Solid state equipment has operational characteristics differing from those of electromechanical equipment.
Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication
SGI-1.1 available from your local Rockwell Automation sales office or online at
http://www.literature.rockwellautomation.com) describes some important differences between solid state
equipment and hard-wired electromechanical devices. Because of this difference, and also because of the
wide variety of uses for solid state equipment, all persons responsible for applying this equipment must
satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many
variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot
assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING Identifies information about practices or circumstances that can cause an explosion in
a hazardous environment, which may lead to personal injury or death, property
damage, or economic loss.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.
ATTENTION Identifies information about practices or circumstances that can lead to personal injury
or death, property damage, or economic loss. Attentions help you identify a hazard,
avoid a hazard and recognize the consequences.
SHOCK HAZARD
Labels may be located on or inside the equipment (e.g., drive or motor) to alert people
that dangerous voltage may be present.
BURN HAZARD
Labels may be located on or inside the equipment (e.g., drive or motor) to alert people
that surfaces may be dangerous temperatures.

SLC 500 BASIC and BASIC-T Modules 3
Publication 1746-IN009B-EN-P - August 2005
Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to use in
hazardous locations.
Environnements dangereux
Cet équipement est conçu pour être utilisé dans des environnements de Classe I,
Division 2, Groupes A, B, C, D ou non dangereux. La mise en garde suivante
s’applique à une utilisation dans des environnements dangereux.
ATTENTION WARNING: EXPLOSION HAZARD
Substitution of components may impair suitability for Class I,
Division 2.
Do not replace components or disconnect equipment unless
power has been switched off.
Do not connect or disconnect components unless power has been
switched off.
All wiring must comply with N.E.C. article 501, 502, 503, and/or
C.E.C. section 18-1J2 as appropriate.
ATTENTION AVERTISSEMENT: DANGER D’EXPLOSION
La substitution de composants peut rendre cet équipement
impropre à une utilisation en environnement de Classe 1, Division
2.
Ne pas remplacer de composants ou déconnecter l'équipement
sans s'être assuré que l'alimentation est coupée.
Ne pas connecter ou déconnecter des composants sans s'être
assuré que l'alimentation est coupée.

4SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
About the BASIC and BASIC-T Modules
The BASIC module is a single-slot module that resides in a SLC 500 fixed or
modular controller chassis. The BASIC-T module is a higher speed version of the
BASIC module with identical hardware features, including two configurable serial
ports for RS-232/423, RS-422, and RS-485 communication with I/O devices.
Communication to an SLC 500 controller can take place across the 1746 I/O
backplane or on the DH485 network through the module’s DH485 port. Both
modules also feature 24K bytes of battery-backed RAM, optional 8K or 32K byte
non-volatile memory modules, and multiple LED indicators for operator interface.
The modules can be programmed using an ASCII terminal or a personal computer
equipped with 1747-PBASE BASIC development software
TIP The 1746-BAS module is compatible with the 1747-M1 and
1747-M2 memory modules.
The 1746-BAS module is also compatible with existing 1747-M3
and 1747-M4 memory modules. The 1747-M3 and 1747-M4
memory modules are no longer available for sale from Rockwell
Automation.
The 1746-BAS-T module is compatible with the 1771-DBMEM1
and 1771-DBMEM2 memory modules.
TIP Due to the high speed of the 1746-BAS-T module, existing
programs written for the 1746-BAS module may require
adjustment for identical operation using the 1746-BAS-T module.

SLC 500 BASIC and BASIC-T Modules 5
Publication 1746-IN009B-EN-P - August 2005
Before You Begin
Before you begin to install the BASIC module and BASIC-T module, you need to:
•identify the communication ports,
•locate the LED indicators, and
•set the module jumpers.
Identify the Communication Ports
There are three communication ports on the front of the BASIC module and
BASIC-T module. They are:
•PRT1
•PRT2
•DH485
The PRT1 port is used to interface the module with user devices. This port is a
serial port that accommodates RS-232/423, RS-422, and RS-485 communication
modes. Port PRT1 is capable of operating full-duplex at 300, 600, 1200, 2400, 4800,
9600, and 19200 bps.
The PRT2 port is used to interface the module with user devices or a modem using
DF1 protocol. This port is a serial port that accommodates RS-232/423, RS-422, and
RS-485 communication modes. Port PRT2 is capable of operating full-duplex at 300,
600, 1200, 2400, 4800, 9600, and 19200 bps.
The DH485 port is used to interface the module with the DH485 network. This port
is not isolated and cannot directly drive the DH485 network. You must use a
1747-AIC link coupler to link port DH485 with the DH485 network.
Refer to Figure 1 for the location of the communication ports.
Locate the LED Indicators
There are eight LED indicators on the front of the BASIC and BASIC-T modules.
These LED indicators are used for module diagnostics and status indication. Refer to
Figure 1 for the location of the LED indicators.
IMPORTANT When DF1 protocol is selected on port PRT2, DH485
communications is disabled.

6SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Figure 1 Communication Ports and LED Indicators
LED Color Status Indication
ACT Green ON The module is receiving power from the backplane and is
executing BASIC code.
Flashing The module is in Command mode.
OFF The module is not receiving power from the backplane. A fault
condition exists.
485 Green ON Port DH485 on the module is active for communication.
OFF Port DH485 on the module is not active for communication.
PRT1 Green Flashing Port PRT1 on the module is transmitting or receiving signals.
OFF Port PRT1 on the module is not transmitting or receiving signals.
PRT2 Green Flashing Port PRT2 on the module is transmitting or receiving signals.
OFF Port PRT2 on the module is not transmitting or receiving signals.
FAULT Red ON A system problem was detected during background diagnostics.
Contact your local Allen-Bradley representative.
OFF No system problems are detected during background diagnostics.
BA LOW Red ON The voltage of the battery that backs up RAM is low. A new
battery is needed.
OFF The voltage of the battery that backs up RAM is at an acceptable
level.
LED1 Amber ON User definable. LED activated through the user program.
OFF User definable. LED de-activated through the user program.
LED2 Amber ON User definable. LED activated through the user program.
OFF User definable. LED de-activated through the user program.
ACT
485
PR T1
PR T2
FAULT
BA LOW
LED1
LED2
PRT1
5
4
3
2
1
9
8
7
6
PRT2
5
4
3
2
1
9
8
7
6
DH485
BASIC
BASIC
LEDs

SLC 500 BASIC and BASIC-T Modules 7
Publication 1746-IN009B-EN-P - August 2005
Set the Module Jumpers
The BASIC module and BASIC-T module have four sets of jumpers that you need to
set. Jumpers JW1 and JW2 configure ports PRT1 and PRT2. Jumper JW3 configures
the type of optional memory module. Jumper JW4 configures the program port.
Figure 2 Jumper Locations
ATTENTION Do not expose the module to surfaces or other areas that may
typically hold an electrostatic charge. Electrostatic charges can
alter or destroy memory.
SLC 500 BASIC MODULE
CAT SER SERIALNO. FRN 12345
6789
CONFIG 12345
6789
DF1 DH485
JW1
Memory Module
JW3
JW4
Battery JW2

8SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Module Jumper JW1
Use jumper JW1 to select one of the following configurations for port PRT1.
•RS-232/423
•RS-422
•RS-485
Figure 3 Jumper JW1 Pin Assignments and Settings
ATTENTION Settings other than those shown for each jumper may cause
damage to the module.
13579
246810
Pin Assignments
RS-232/423 (Shipped Configuration)
RS-422
RS-485

SLC 500 BASIC and BASIC-T Modules 9
Publication 1746-IN009B-EN-P - August 2005
Module Jumper JW2
Use jumper JW2 to select one of the following configurations for port PRT2.
•RS-232/423
•RS-422
•RS-485
Figure 4 Jumper JW2 Pin Assignments and Settings
Module Jumper JW3
Use jumper JW3 to configure the memory module socket for one of the following
optional memory modules.
Memory Module Memory Size and Type Compatible with
1747-M1 8 K bytes EEPROM 1746-BAS module
1747-M2 32 K bytes EEPROM 1746-BAS module
1747-M3(1)
(1) This memory module is no longer available for sale from Rockwell Automation. Existing
1747-M3 and 1747-M4 memory modules are compatible with the 1746-BAS module and
1746-BAS-T module.
8 K bytes UVPROM 1746-BAS module
1747-M4(1) 32 K bytes UVPROM 1746-BAS module
1771-DBMEM1 8 K bytes EEPROM 1746-BAS-T module
1771-DBMEM2 32 K bytes EEPROM 1746-BAS-T module
13579
246810
Pin Assignments
RS-232/423 (Shipped Configuration)
RS-422
RS-485

10 SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Figure 5 Jumper JW3 Pin Assignments and Settings
Module Jumper JW4
Use jumper JW4 to select one of the following configurations for the module ports.
•PRT1 Port = Program port with default communication settings
PRT2 Port = ASCII interface port
DH485 Port = Run time DH485 operation only
•PRT1 Port = ASCII interface port
PRT2 Port = ASCII interface port
DH485 Port = Program port with DH485 protocol
•PRT1 Port = Program port with programmed communication settings
PRT2 Port = ASCII interface port
DH485 Port = Run time DH485 operation only
•PRT1 Port = Program port with programmed communication settings
PRT2 Port = DF1 protocol
DH485 Port = Disabled
IMPORTANT The first setting shown in Figure 6 is the default configuration.
When the jumper is set in this position, the module always
powers up in Command mode at 1200 bps, no parity, 8 data bits,
and 1 stop bit.
246
135
Pin
Assignments
1747-M4 UVPROM(1)
(1) This memory module is no longer available for sale from Rockwell Automation. Existing 1747-M3 and
1747-M4 memory modules are compatible with the 1746-BAS module and 1746-BAS-T module.
1747-M1 EEPROM
1747-M2 EEPROM
1747-M3 UVPROM(1)
1771-DBMEM1 EEPROM
1771-DBMEM2 EEPROM
(Shipped Configuration)

SLC 500 BASIC and BASIC-T Modules 11
Publication 1746-IN009B-EN-P - August 2005
Figure 6 Jumper JW4 Pin Assignments and Settings
IMPORTANT When DF1 protocol is selected for port PRT2, port DH485 is not
available for DH485 programming or run time operation.
DF1 communication must be enabled through the BASIC
program.
351
462
PRT1 Port = Program port with default communication settings
PRT2 Port = ASCII interface port
DH485 Port = Run time DH485 operation only
PRT1 Port = ASCII interface port
PRT2 Port = ASCII interface port
DH485 Port = Program port with DH485 protocol
(Shipped Configuration)
Pin Assignments
PRT1 Port = Program port with programmed communication settings
PRT2 Port = ASCII interface port
DH485 Port = Run time DH485 operation only
PRT1 Port = Program port with programmed communication settings
PRT2 Port = DF1 protocol
DH485 Port = Disabled

12 SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Install the 1746-BAS Module and 1746-BAS-T Module
Your BASIC module or BASIC-T module may be installed in any open slot of an SLC
500 1746 I/O chassis except the first slot of the first chassis. The first slot is reserved
for the controller or adapter module. The BASIC module or BASIC-T module can
also be installed in an SLC fixed controller expansion chassis.
1. Turn off power to the chassis where you will insert the module.
2. Align the circuit board of the module with the card guide of a slot (except
slot 0) in the 1746 chassis.
Figure 7 Module Location in the Chassis
3. Slide the module in until the top and bottom retainer clips are secured.
ATTENTION Never install, remove, or wire any module while power is applied.
Also, do not expose the modules to surfaces or other areas that
may typically hold an electrostatic discharge.
Electrostatic discharge can damage integrated circuits or
semiconductors if you touch backplane connector pins.
If the equipment is not installed and used as described in the SLC
500 Modular Hardware Style User Manual, publication
1747-UM011, the protection provided by the equipment may be
impaired.
Card Guide
Module Release

SLC 500 BASIC and BASIC-T Modules 13
Publication 1746-IN009B-EN-P - August 2005
Wire the PRT1 and PRT2 Communication Ports
Ports PRT1 and PRT2 can communicate to user devices through RS-232/423, RS-422,
and RS-485 communication modes. The communication mode you select depends
on the setting of jumpers JW1 and JW2. Refer to the MODE command in the BASIC
Reference Manual, publication 1746-RM001, for the default programming port
configuration information.
Pin Assignments
Use these pin assignments to wire the mating connector of the cable used to
interface a user device to port PRT1 or PRT2. The sockets of this connector must be
wired to correspond to the selected communication mode.
Wiring diagrams for the RS-232/423 communication mode are shown starting on
page 16.
IMPORTANT When default communications are selected via JW4, the module
always powers up in the Command mode at 1200 bps, no parity, 8
data bits, and 1 stop bit.
Pin RS-232/423 RS-422 RS-485 IBM AT Standard
RS-232 Signals
1Note 1 422 TXD - TRXD - DCD or CD
2RXD 422 RXD - (3)
(3) In RS-485 mode, these pins are still connected to their RS-422 receivers. Do not use these pins in RS-485 mode.
RXD
3TXD (2)
(2) In RS-422 and RS-485 modes, these pins are connected to their RS-423 drivers and receivers. Do not use these pins in
either RS-422 or RS-485 mode.
(2) TXD
4DTR (2) (2) DTR
5COMMON COMMON COMMON COMMON
6DSR 422 RXD + (3) DSR
7RTS (2) (2) RTS
8CTS (2) (2) CTS
9(1)
(1) In RS-423 mode, these pins are still connected to their RS-422 loads. Do not use these pins in RS-423 mode.
422 TXD + TRXD + RI

14 SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Hardware Handshaking
The module uses the following rules when hardware handshaking is enabled. The
module:
•does not transmit until CTS (Clear to Send) becomes active, and
•examines DSR (Data Set Ready) following the receipt of a character.
If DSR is active, the character is placed in the input queue. If DSR is inactive, the
character is assumed to be noise and is discarded.
DTE and DCE Overview
DTE - Data Terminal Equipment
The serial ports are configured as 9-pin Data Terminal Equipment (DTE), as are
most terminals or computer ports.
IMPORTANT You need to know whether the device connecting to the module
has a DTE or DCE interface. Figures 8 through 12, starting on
page 16, are provided to help you make the appropriate
connection.
DTE 9
Pinout
Signal
Description
Signal from DTE
Perspective
DTE 25
Pinout
Signal
Description
Pin # Pin #
1 NC-No Connection Input 8 CD-Carrier Detect
2 RXD-Received Data Input 3
3 TXD-Transmitted Data Output 2
4 DTR-Data Terminal Ready Output 20
5 COM-Signal Common Shared 7
6 DSR-Data Set Ready Input 6
7 RTS-Request to Send Output 4
8 CTS-Clear to Send Input 5
9 NC-No Connection Input 22 RI-Ring Indicator

SLC 500 BASIC and BASIC-T Modules 15
Publication 1746-IN009B-EN-P - August 2005
DCE - Data Communication Equipment
Devices such as modems are Data Communication Equipment (DCE). The pinouts
on these terminals are defined for ease of interfacing with DTE equipment.
DCE 9
pinout
Signal Description Signal from DCE
Perspective
DCE 25
pinout
Pin # Pin #
1 CD-Carrier Detect Output 8
2 RXD-Received Data Output 3
3 TXD-Transmitted Data Input 2
4 DTR-Data Terminal Ready Input 20
5 COM-Signal Common Shared 7
6 DSR-Data Set Ready Output 6
7 RTS-Request to Send Input 4
8 CTS-Clear to Send Output 5
9 RI-Ring Indicator Output 22
IMPORTANT All signal directions listed in the previous two tables are valid. For
example, TXD, Transmitted Data, is a DTE output but is also a
DCE input. The signal description is the same for DTE and DCE
but the direction of the signal (perspective) has changed based on
whether you have a DTE or DCE device.

16 SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Figure 8 RS-232/423 Wiring Diagram - 1746-BAS Module or 1746-BAS-T Module
to a Modem (Hardware Handshaking Enabled)
Figure 9 RS-232/423 Wiring Diagram - 1746-BAS Module or 1746-BAS-T Module
to DTE Device (Hardware Handshaking Disabled)
IMPORTANT For DCE devices other than modems, connect the DSR of the
module with the DSR of the device. The CD signal of the device
(other than a modem) is not used.
N.C.1
RXD2
TXD3
DTR4
COM5
DSR6
RTS7
CTS8
N.C.9
CD
RXD
TXD
DTR
COM
DSR
RTS
CTS
RI
8
3
2
20
7
6
4
5
22
1
2
3
4
5
6
7
8
9
BASIC DTE DCE 9-Pin 25-Pin
N.C.1
RXD2
TXD3
DTR4
COM5
DSR6
RTS7
CTS8
N.C.9
DCD
TXD
RSD
DSR
COM
DTR
CTS
RTS
GND
8
2
3
6
7
20
5
4
1
1
3
2
6
5
4
8
7
(1)
(3)
(2)
(2)
(2)
(2)
BASIC DTE DCE 9-Pin 25-Pin
(1) Connect to the shield of the cable.
(2) Jumpers are only needed if you cannot disable the hardware handshaking on the port.
(3) This is a N.C. for the 1747-KE module, 1746-BAS module, or 1746-BAS-T module.

SLC 500 BASIC and BASIC-T Modules 17
Publication 1746-IN009B-EN-P - August 2005
Figure 10 RS-232/423 Wiring Diagram - 1746-BAS Module or 1746-BAS-T Module
to Printer (Hardware Handshaking Enabled, Standard Printer Adapter Cable)(1)
Figure 11 RS-422 Wiring Diagram
Figure 12 RS-485 Wiring Diagram
N.C.1
RXD2
TXD3
DTR4
COM5
DSR6
RTS7
CTS8
N.C.9
CD
TXD
RXD
DSR
COM
DTR
CTS
RTS
RI
8
2
3
6
7
20
5
4
22
1
3
2
6
5
4
8
7
9
GND 1
(2)
BASIC DTE DCE 9-Pin 25-Pin
(1) The 1747-CP3 cable works in this application.
(2) Connect to the shield of the cable.
TXD1
RXD2
3
4
COM5
RXD+6
7
8
TXD+9
RXD
TXD
COM
TXD+
RXD+
BASIC
TRXD-1
2
3
4
COM5
6
7
8
TRXD+9
TRXD-
COM
TRXD+
BASIC

18 SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
Wire to the DH485 Port
Port DH485 can communicate to user devices through the DH485 communication
mode. Use a 1747-C10 cable or 1747-C13 cable to connect the module to a link
coupler interfaced with the DH485 network.
Figure 13 Connecting the Module to a DH485 Network
IMPORTANT The 1747-C13 cable acts only as a communication link and does
not carry 24V dc power. Use a 1747-C10 cable or 1747-C11 cable
to carry power from the controller to the link coupler, or from the
module to the link coupler.
To DH485 Network
To DH485 Network
SLC 5/01, 5/02, and
5/03 Controller
SLC 5/04 or 5/05
Controller
BASIC or BASIC-T Module
BASIC or BASIC-T Module
1747-AIC
Link Coupler
1747-AIC
Link Coupler
1747-C13 Cable
1747-C13 Cable
1747-C10 or -C11 Cable
1747-C10 or -C11 Cable

SLC 500 BASIC and BASIC-T Modules 19
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Apply Power to your BASIC Module and BASIC-T Modules
Once you have installed your BASIC module or BASIC-T module in your SLC 500
chassis, you are ready to apply power to your SLC 500 system and begin
programming.
Configure the BASIC Module and BASIC-T Module
Your BASIC module or BASIC-T module can be programmed using an ASCII
terminal or ASCII terminal emulation software. You can also use a personal
computer with the BASIC Development Software (cat. no. 1747-PBASE). Use an
ASCII terminal to enter a BASIC program one line at a time. Use a personal
computer with the BASIC development software to create a BASIC program that is
then downloaded to your module. Typical configurations are shown in Figure 14.
Figure 14 Module Configurations
1747-C10 Cable
PC with
BASIC Development Software
ASCII Terminal or PC with
BASIC Development Software
Null Modem Cable
to RS-232 Port
Interface/Converter
RS-232 to RS-485
Cat. No. 1747-PIC
SLC 500 Controller
with BASIC or BASIC-T Module
SLC 500 Controller
with BASIC or BASIC-T Module

20 SLC 500 BASIC and BASIC-T Modules
Publication 1746-IN009B-EN-P - August 2005
B a t t e r y R e p l a c e m e n t , H a n d l i n g , S t o r a g e , a n d Tr a n s p o r t a t i o n
(Cat. No. 1747-BA)
Battery Replacement
Your module provides back-up power for RAM through a replaceable lithium
battery (cat. no. 1747-BA). This battery provides back-up for approximately five
years. A BAT LOW indicator on the front of the module alerts you when the battery
voltage has fallen below the replace battery threshold level.
To replace the lithium battery:
1. Remove power from the SLC 500 power supply module.
2. Remove the module from the chassis by pressing the retainer clips at the top
and bottom of the module.
ATTENTION Do not remove the module from the SLC 500 chassis until all
power is removed from the SLC 500 power supply.
IMPORTANT If the top or bottom retainer clips are broken while removing the
module from the chassis, they can be easily replaced. Pry off any
broken clips from the bottom with a screwdriver, if necessary. Do
not twist off. Snap in the replacement clip. Order cat. no.
1746-R15 (two per package).
ATTENTION Do not expose the module to surfaces or other areas that may
typically hold an electrostatic charge. Electrostatic charges can
alter or destroy memory.