RSTI-EP Slice I/O
GFK-2992B
Serial Communication Module EP-5261
September 2016
Function Block FB_RSTI_EP_5261
Handling Function Block FB_MBM_RTU_Master
Serial Communication Module EP-5261
The RSTi-EP Serial Communication (EP-5261) module provides extended
communication options. For example, devices (such as barcode scanners or
printers) can be integrated consistently in RSTi-EP systems using an RS-232,
RS-485, or RS-422 interface. The EP-5261 module presents a solution for
connecting the control cabinet to the field.
The data transfer rate can be parameterised between 300 and 11,5200 bps.
The process data length can be parameterised to be 8 or 16 byte. A
terminating resistor can be parameterised for the RS-485 and RS-422
interface respectively.
The communication status is indicated by two LEDs on the respective plug.
The module electronics supply the connected data terminal device with
power from the input current path (I
supply voltage outputs are protected against over-current.
The module features a type plate, which includes identification information,
the key technical specifications, and a block diagram. Additionally, a QR code
allows for direct online access to the associated documentation. The
software for reading the QR code must support inverted QR codes.
Markers are available as accessories for labelling the equipment. Each I/O
module can be labelled to ensure clear identification when replacing
individual modules or electronic units.
) either with 5 V dc or 24 V dc. Both
IN
The RSTi-EP station is usually installed on a horizontally positioned DIN-rail.
Installation on vertically positioned DIN rails is also possible.
Modules should to be allowed to de-energize for a minimum 10 seconds after
power down, prior to starting any maintenance activity.
Refer to the RSTi-EP Slice I/O User Manual (GFK-2958) for additional
information.
For power-feed (a software utility available on PME V9.00) requirements, refer
to the RSTi-EP Power Supply Reference Guide.
EP-5261 Module Features
• Spring style technology for ease of wiring
• DIN-rail mounted
Serial Communication Module EP-5261
© 2016 General Electric Company.
*
Indicates a trademark of General Electric Company and/or its subsidiaries. All other trademarks are the property of their respective owners.
• Double-click installation for positive indication of correct installation
• Supports indirect firmware update through the network monitor
• Supports replacement without shutting down the system
2 RSTi-EP Slice I/O Serial Communication Module
System Data
Data
Process, parameter, and diagnostic data depend on the network adapter used
Interface
RSTi-EP system bus
System bus transfer rate
48 Mbps
Serial Interfaces
Number
1
Type
parameterisable
Transfer Rate
300 – 11,5200 Bps, parameterisable
Supply voltage
5 V dc or 24 V dc
Current of power supply output
500 mA max
Standards RS232
DIN 66020, DIN 66259, EIA-RS232C, CCITT V.24 / V.28
RS485/RS422
Short-circuit-proof
Yes
Module diagnosis
Yes
Individual channel diagnosis
Yes
Supply
Supply voltage
20.4 V – 28.8 V
system current path I
SYS
current path IIN
General Data
Operating temperature
-20 to +60°C (-4 to +140 °F)
Storage temperature
-40 to +85°C (-40 to +185 °F)
5 to 95%, noncondensing as per IEC 61131-2
Width
11.5 mm (0.45 in)
76 mm (2.99 in)
Height
120 mm (4.72 in)
Weight
92 g (3.25 oz)
GFK-2992B
Ordering Information
Module Description
EP-5261 RSTi-EP Slice I/O Serial Communication module
Specifications
Item EP-5261 Specification
RS-232, RS-485, RS-422,
Standards RS485/RS422 DIN 66259 part 1 and 3, EIA-RS422/485, CCITT V.11
Terminating resistor
Current consumption from
Current consumption from input
Air humidity (operation/transport)
Depth
120 Ω, parameterisable
8 mA
16 mA + Load
RSTi-EP Slice I/O Serial Communication Module 3
Product
I
IIN
I
IS
IL
EP-5261
8 mA
16 mA + Load
--
--
--
I
x
Current consumption from the system current path
Must be included when calculating the power supply
LED
EP-5261 Status
Red: Collective error diagnostic
Yellow flashing: Data is being received
Yellow flashing: Data is being transmitted
1.3
--
1.4
--
2.1
--
2.2
--
2.3
--
2.4
--
3.1
3.2
3.3
Yellow flashing: Data are being recieved
3.4
Yellow flashing: Data are being transmitted
4.1
Green: Supply voltage +5 V dc
4.2
--
4.3
Green: Supply voltage +24 V dc
4.4
--
GFK-2992B
Current Demand for Analog Output Modules
LEDs
SYS
I
IN
I
OUT
I
S
I
L
Module
Status
1.1
1.2
SYS
Power consumption from input current path
Power consumption from output current path
Current demand of the connected sensors
Current demand of the connected actuators
Green: Communication over the system bus
Yellow: RS-232 parameterised
Yellow: RS-232 parameterised
3.1 - 3.4 Yellow: RS-422 parameterised
3.1 + 3.2 Off, 3.3 + 3.4 Yellow: RS-485 parameterised
OUT
For public disclosure
4 RSTi-EP Slice I/O Serial Communication Module
Description
Options1
Default
Operating mode
Disabled (0) / RS232 (1) / RS485 (2) / RS422 (3)
Disabled
Data bits2
7 Bit (0) / 8 Bit (1)
8 Bit
300 (0) / 600 (1) / 1200 (2) / 2400 (3) / 4800 (4) / 9600 (5) / 14400 (6) /
Stop bit
1 Bit (0) / 2 Bit (1)
1 Bit
Parity
None (0) / Even (1) / Odd (2)
None
Flow control
None (0) / CTS/RTS (1) / XON/XOFF (2)
None
XON character
0 ... 255
17
XOFF character
0 ... 255
19
Terminating resistor
Process data length
16 Byte (1)
16 Byte
1) Values in brackets for EtherCAT and Modbus-TCP
2) Option 7 Bit works only in combination with a parity (even or odd)
GFK-2992B
Overview of Editable Parameters
Baud rate
RS-485/422
19200 (7) / 28800 (8) / 38400 (9) / 57600 (10) / 115200 (11)
Off (0) / On (1) Off
9600
RSTi-EP Slice I/O Serial Communication Module 5
Name
Bytes
Bit
Description
Default
0
Module error
1
Internal error
2
External error
3
Channel error
0
4
Error 5
Reserved
0
6
Reserved
0
7
Parameter error
0
1 1 0
2 1 3
0
4
Reserved
0
5
Reserved
0
6
Reserved
0
7
Reserved
0
Error byte 2
2
0-7
Reserved
0
0-2
Reserved
0
3
Internal diagnostic FIFO full
0
4-7
Reserved
0
0
1
1 0 2
0
3
1
4
1
5 1 6 1 7
0
Diagnostic bits per
Number of channels
6 Number of similar channels per module
1
Channel error
7-10
0-31
Reserved
0
Time stamp
43-46
Time stamp [μs] (32 bit)
GFK-2992B
Diagnostic Data
Error indicator 0
Module Type 0x05
Module type 1
Error byte 3 3
Channel type 4
channel
Channel type 0x79
5 Number of diagnostic bit per channel 0
For public disclosure
6 RSTi-EP Slice I/O Serial Communication Module
Byte
Format
Name
Bit
Description
Notes
RX = 0: Receive memory is empty
ready for transmission.
Only 10 characters are left in the
parametrerised.
IX0.2
Not used
The RX_CNT value is assigned to each
The TX_CNT_ACK value is a copy of the
data has been taken over successfully.
STAT = 1: Communication with the
Length of the
diagnosis data
IB 2 ... IB
GFK-2992B
Data Transfer
The process data length can be parameterized to be 8 or 16 Bytes. Byte 0 is used for status and diagnosis, Byte 1 for the
data segment length, and the remaining 6 or 14 Bytes are user data.
Process input data: The data sent from the serial device are written into the receive memory of the module. As soon as
the SPS request results in that RX_CNT is not equal RX_CNT_ACK, the data will be sent in segments via the fieldbus
coupler to the PLC. The successfully data transfer will be acknowledged to the module.
The receive memory can safe a maximum of 255 Bytes. A software handshake (XON/XOFF) or a hardware handshake
(RTS/CTS) can be parameterised using the flow control, so that an alarm will warn against a buffer overflow.
Process output data: The data sent from the PLC via the fieldbus coupler are written into the transmission memory of
the module. The module is continously checking if data is ready to be sent or a data transfer to the device has
completed successfully. Not until then will the next data will be transferred.
Process Input Data
IB0
Word
Status and
Diagnosis
IX0.0
IX0.1
IX0.3 RX_CNT
IX0.4 RX_CNT
IX0.5 TX_CNT_ACK
IX0.6 TX_CNT_ACK
IX0.7 STAT
Data in the receive
memory
Receive memory
nearly full
RX = 1: A telegram or telegram
segment in the receive memory is
receive memory. XOFF will be set if
data segment of the process input
data while transmission. The sequence
or the RX_CNT values is:
Binary: 00, 01, 10, 11, 00, ...
Decimal: 0, 1, 2, 3, 0, ...
A faulty data seqence indicates
missing data segments.
TX_CNT value, which has been
transferred together with the last data
segment of the process output data.
TX_CNT_ACK acknowledges that the
device is without fault.
STAT = 0: Faulty communication with
the device.
IB1 Word
7
or
IB 2 ... IB
15
Received data
data segment
/ of the
subsequent
RX
User data of the
transferred telegram
segment
Length of the data / diagnosis data in
this frame
RSTi-EP Slice I/O Serial Communication Module 7
Byte
Format
Name
Bit
Description
Remarks
Bit 0: RXBUF FLUSH
scrubbed with RXBUF FLUSH = 1.
Bit 1: TXBUF FLUSH
scrubbed with TXBUF FLUSH = 1.
Bit 2: DisableSend_TX_HWBUFFER
DisableSend_TX_HWBUFFER is set to 0 again.
The TX_CNT value is assigned to each data
segments.
RX_CNT_ACK must include a copy of the
receive new data.
The input data status bit STAT will be reset
cannot be scrubbed.
Length of the
data segment
QB 2 ... QB 7
QB 2 ... QB 15
User data of the
telegram segment
GFK-2992B
Process Output Data
The receive memory can be scrubbed using
this bit.
STATRES = 1: A requirement with RXBUF FLUSH
= 1 will be ignored.
STATRES = 0: The receive memory will be
The emission memory can be scrubbed using
this bit.
STATRES = 1: A requirement with TXBUF FLUSH
= 1 will be ignored.
STATRES = 0: The emission memory will be
This bit controls the hardware emission
memory:
DisableSend_TX_HWBUFFER = 0: The hardware
emission memory is released. A character
(Byte) will be sent as soon as it reaches the
buffer.
DisableSend_TX_HWBUFFER = 1: The hardware
emission memory is locked. Characters (Bytes)
will only be sent, when
segment of the process output data. The
sequence or the TX_CNT values is:
Binary: 00–>01–>10–>11–>00...
Decimal: 0–>1–>2–>3–>0...
A faulty data sequence indicates missing data
QB0
Word
IX0.0 RXBUF FLUSH
IX0.1 TXBUF FLUSH
IX0.2 RX_HWBUFFER
Status and
Diagnosis
IX0.3 TX_CNT
IX0.4 TX_CNT
QB1 Word
or
Transmission
data
IX0.5 RX_CNT_ACK
IX0.6 RX_CNT_ACK
IX0.7
Communication
Status
transferred
For public disclosure
RX_CNT value. The RX_CNT value has been
transferred together with the last data
segment of the process input data.
RX_CNT_ACK must be set in analogy with
RX_CNT (in the status byte). It indicates that the
data segment has been transferred
successfully by using RX_CNT and enables to
using this bit. When changing from 1 to 0
(falling edge) STAT will be reset from 0 to 1.
STAT = 0: All changes in the data fields
TX_BYTE_CNT, TX_CNT and RX_CNT_ACK will be
ignored. The receive or emission memory can
be scrubbed using RXBUF FLUSH or TXBUF
FLUSH respectively.
STAT = 1 or changing from 0 to 1: The buffers
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