Siemens 6ES7151-7AA21-0AB0

1. Interface
Interface type	Integrated RS 485 interface
Isolated	Yes

2. Interface
Isolated	Yes

2. Interface
Interface type	External interface via master module 6ES7138-4HA00-0AB0

Address area
Inputs, max	2kbyte
Outputs, max	2kbyte

adjustable for S7 basic communication, min
adjustable for S7 basic communication, max	10
usable for routing	4; As slave only with active interface, with IM 151-7 CPU as DP master

Analog channels
Inputs	1021
Outputs	1021

Analog channels
of which central	124

Backup
present	Yes; Ensured by SIMATIC Micro Memory Card (maintenance-free)

Clock
Backup time	6wk; At 40 C ambient temperature, typically
Deviation per day, max	10s; Typ.: 2 s
Hardware clock (real-time)	Yes

Clock
Behavior of the clock following expiry of backup period	the clock continues at the time of day it had when power was switched off
Behavior of the clock following POWER-ON	Clock continues running after POWER OFF
retentive and synchronizable	Yes

Clock synchronization
in AS, master	No
in AS, slave	No
to DP, master	Yes; With DP slave only slave clock

Clock synchronization
supported	Yes

Clock synchronization
to MPI, master	Yes

Clock synchronization
to DP, slave	Yes
to MPI, slave	Yes

communication functions / header
Data record routing	Yes; With DP master module

communication functions / header
PG/OP communication	Yes

configuration / header
Configuration rules	max. 63 peripheral modules per station; station width < 1 m or < 2 m; max. 10 A per load group (power module); master interface module on right next to IM 151-7 CPU (X2 interface)

configuration / programming / header
Nesting levels	8
System function blocks (SFB)	see instruction list

configuration / programming / header
Command set	see instruction list
System functions (SFC)	see instruction list

Configuration software
STEP 7 Lite	No

CPU processing times
for bit operations, typ	0.06
for floating point arithmetic, typ	0.59
for word operations, typ	0.12

CPU processing times
for fixed point arithmetic, typ	0.16

CPU-blocks
Number of blocks (total)	1024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used

Data areas and their retentivity
Retentive data area (incl. timers, counters, flags), max	64kbyte

Data blocks
Retentivity preset	Yes

Data blocks
Retentivity adjustable	Yes; via non-retain property on DB

DB
Size, max	64kbyte

DB
Number, max	1024; Number range: 1 to 16000

Degree and class of protection
IP degree of protection	IP20

Diagnostic buffer
present	Yes

Diagnostic buffer
Number of entries, max	500

Diagnostic buffer
adjustable	Yes; From 10 to 499
Number of entries readable in RUN, max	499
of which powerfail-proof	100; Only the last 100 entries are retained
preset	10

Diagnostics indication LED
Group error SF (red)	Yes

Diagnostics indication LED
Monitoring 24 V voltage supply ON (green)	Yes

Digital channels
Inputs	16336
Outputs	16336

Digital channels
of which central	496

Dimensions
Depth	75mm
Height	119.5mm
Width	60mm; DP master module: 35 mm

Engineering with
Programming package	as of STEP 7 V5.5 + SP1 or as of V5.2 + SP1 + HSP 219 or as of STEP 7 TIA Portal V11

FB
Size, max	64kbyte

FB
Number, max	1024; Number range: 0 to 7999

FC
Size, max	64kbyte

FC
Number, max	1024; Number range: 0 to 7999

Flag
Size, max	256byte

Flag
Number of clock memories	8; 1 memory byte

Flag
Retentivity available	Yes; MB 0 to MB 255

Flag
Retentivity preset	MB 0 to MB 15

Forcing
Forcing	Yes

Forcing
Forcing, variables	Inputs, outputs
Number of variables, max	10

General information
Firmware version	V3.3
HW functional status	01

Global data communication
Number of GD loops, max	8
Number of GD packets, transmitter, max	8
Size of GD packets, max	22byte

Global data communication
Number of GD packets, receiver, max	8
Size of GD packet (of which consistent), max	22byte
supported	Yes

Global data communication
Number of GD packets, max	8

Hardware configuration
Number of modules per system, max	63; Centralized

I/O address area
Inputs	2048byte
Outputs	2048byte

IEC counter
Number	Unlimited (limited only by RAM capacity)

IEC counter
Type	SFB

IEC counter
present	Yes

IEC timer
Number	Unlimited (limited only by RAM capacity)

IEC timer
Type	SFB

IEC timer
present	Yes

Input current
from supply voltage 1L+, max	320mA; 410 mA with DP master module

Input current
Inrush current, typ	1.8A

Input current
I	0.09A

Interface types
RS 485	Yes

Interface types
Output current of the interface, max	No

Interfaces
Interfaces/bus type	1 x MPI/PROFIBUS DP

Interrupts/diagnostics/status information
Alarms	Yes
Diagnostics function	Yes

Isolation
Isolation tested with	500 V DC

Know-how protection
User program protection/password protection	Yes

Know-how protection
Block encryption	Yes; With S7 block Privacy

Load memory
Plug-in (MMC), max	8Mbyte

Load memory
Data management on MMC (after last programming), min	10a
Plug-in (MMC)	Yes

Local data
per priority class, max	32kbyte; Max. 2048 bytes per block

lower limit
preset	No retentivity
upper limit	255

Mains buffering
Mains/voltage failure stored energy time	5ms

Mounting rail
Length of mounting rail, max	Station width: ≤ 1 m or < 2 m
Number of mounting rails that can be used	1

MPI
Transmission rate, max	12Mbit/s

Nesting depth
per priority class	16

Nesting depth
additional within an error OB	4

Number of connections
overall	12

Number of connections
usable for OP communication	11
usable for PG communication	11
usable for S7 basic communication	10

Number of connections
adjustable for OP communication, max	11
adjustable for OP communication, min	1
adjustable for PG communication, max	11
adjustable for PG communication, min	1
reserved for OP communication	1
reserved for PG communication	1

Number/Number range
Granularity	1h
Range of values	0 to 2^31 hours (when using SFC 101)
retentive	Yes; Must be restarted at each restart

OB
Number, max	See S7-300 operation list

OB
Number of delay alarm OBs	2; OB 20, 21
Number of free cycle OBs	1; OB 1
Number of process alarm OBs	1; OB 40
Number of startup OBs	1; OB 100
Number of synchronous error OBs	2; OB 121, 122

OB
Number of asynchronous error OBs	6; OB 80, 82, 83 (for centralized I/O only, not for distributed I/O), 85, 86, 87
Number of cyclic interrupt OBs	4; OB 32, 33, 34, 35
Number of DPV1 alarm OBs	3; OB 55, 56, 57
Number of time alarm OBs	1; OB 10
Size, max	64kbyte

of which distributed
Inputs	2048byte

of which distributed
Outputs	2048byte

Open IE communication
TCP/IP	No

Operating hours counter
Number	1

Output current
for backplane bus (5 V DC), max	700mA

Potential separation
between PROFIBUS DP and all other circuit components	Yes

Power loss
Power loss, typ	4.2W

Process image
Inputs, adjustable	2048byte
Outputs, adjustable	2048byte

Process image
Inputs	2048byte
Outputs	2048byte
Outputs, default	128byte

Process image
Inputs, default	128byte

Product function
Isochronous mode	No

PROFIBUS DP master
Number of DP slaves, max	32; Per station

PROFIBUS DP master
Transmission rate, max	12Mbit/s

PROFIBUS DP slave
Address area, max	32
automatic baud rate search	Yes; only with passive interface
Transmission rate, max	12Mbit/s
User data per address area, max	32byte; Up to max. size of the transfer memory

PROFIBUS DP slave
GSD file	The latest GSD file is available on the Internet (http://www.siemens.com/profibus-gsd)

programming / cycle time monitoring / header
adjustable	Yes

programming / cycle time monitoring / header
upper limit	6000ms

programming / cycle time monitoring / header
lower limit	1ms

programming / cycle time monitoring / header
cycle monitoring time / preset	150ms

Programming language
CFC	Yes; Optional
FBD	Yes
GRAPH	Yes; Optional
HiGraph	Yes; Optional
LAD	Yes
SCL	Yes; Optional
STL	Yes

Protocols
MPI	No

Protocols
PROFIBUS DP slave	No

Protocols
PROFIBUS DP master	Yes

Protocols
Point-to-point connection	No

Retentivity
adjustable	Yes

S7 basic communication
User data per job, max	76byte

S7 basic communication
supported	Yes
User data per job (of which consistent), max	76byte; 76 bytes (with X_SEND or X_RCV); 64 bytes (with X_PUT or X_GET as server)

S7 communication
as client	No
as server	Yes
supported	Yes
User data per job, max	See online help of STEP 7 (shared parameters of the SFBs/FBs and of the SFCs/FCs of S7 Communication)

S7 communication
User data per job (of which consistent), max	See online help of STEP 7 (shared parameters of the SFBs/FBs and of the SFCs/FCs of S7 Communication)

S7 counter
Number	256

S7 message functions
Number of login stations for message functions, max	12; Depending on the configured connections for PG/OP and S7 basic communication

S7 message functions
Process diagnostic messages	Yes; ALARM_S, ALARM_SC, ALARM_SQ, ALARM_D, ALARM_DQ

S7 message functions
simultaneously active Alarm-S blocks, max	300

S7 times
Number	256

Service data
can be read out	Yes

Services
Activation/deactivation of DP slaves	Yes
Direct data exchange (slave-to-slave communication)	Yes
DPV1	Yes
Equidistance	Yes
Global data communication	No
Isochronous mode	No
Number of DP slaves that can be simultaneously activated/deactiv	8
PG/OP communication	Yes
Routing	Yes
S7 basic communication	Yes; I blocks only
S7 communication	Yes; Only server, configured on one side
S7 communication, as client	No
S7 communication, as server	Yes
SYNC/FREEZE	Yes

Status/control
Status/control variable	Yes
Variables	Inputs, outputs, memory bits, DB, times, counters

Status/control
Number of variables, max	30

Status/control
of which control variables, max	14
of which status variables, max	30

Supply voltage
permissible range, lower limit (DC)	19.2V
permissible range, upper limit (DC)	28.8V
Rated value (DC)	24V

Supply voltage
Reverse polarity protection	Yes; against destruction

Supply voltage
external protection for power supply lines (recommendation)	2 A min

Test commissioning functions
Number of breakpoints	4
Status block	Yes; Up to 2 simultaneously

Test commissioning functions
Single step	Yes

Time range
lower limit	10ms
upper limit	9990s

Transfer memory
Inputs	244byte
Outputs	244byte

User data per DP slave
Inputs, max	244byte
Outputs, max	244byte

Weights
Weight, approx	200g; DP master module: Approx. 100 g

Work memory
expandable	No
integrated	128kbyte