Client/server functionality

• / •

• / •

• / •

• / •

Function codes

1, 2, 3, 4, 5, 6, 15 and 16

1, 2, 3, 4, 5, 6, 15 and 16

1, 2, 3, 4, 5, 6, 15 and 16

1, 2, 3, 4, 5, 6, 15 and 16

Modbus address range

0 - 65535

0 - 65535

0 - 65535

0 - 65535

Data volume

Read register

125

125

125

125

Write register

123

123

123

123

Read bits

2000

2000

2000

2000

Write bits

1968

1968

1968

1968

Capable of multi-instance

•

•

•

•

Max. number
of parallel block calls

• CPU-dependent
• Client: No limit to the number of block calls; maximum number of simultaneously active blocks limited by the CPU (AG_SEND/AG_RECV)
• Server: limited by the max. number of AG_SEND/AG_RECV calls of the CPU

• Unlimited number of block calls;
• Number of simultaneously established connections is dependent on the CPU

• CPU-dependent
• Client: No limit to the number of block calls; maximum number of simultaneously active blocks limited by the CPU (AG_SEND/AG_RECV)
• Server: limited by the max. number of AG_SEND/AG_RECV calls of the CPU

• Unlimited number of block calls;
• Number of simultaneously established connections is dependent on the CPU

Connection
configuration

Static connections over NetPro

Dynamic connections over TCON and TDISCON

Static connections over NetPro

Dynamic connections over TCON and TDISCON

Communication

AG_(L)SEND/
AG_(L)RECV

TSEND/
TRCV

AG_(L)SEND/
AG_(L)RECV

TSEND/
TRCV

Work memory requirement
FB (Client/Server)

IDB

16 KB

approx. 1 KB

19 KB

approx. 1 KB

20 KB

approx. 1 KB

17 KB

approx. 1 KB

Can be used in CFC/PCS 7

•

•

•

•

Use with older CPs that do not support the AG_CNTRL

No

-

No

-

Multiplexing of TCP connections

CP-dependent

-

CP-dependent

-

Redundancy functions

-

-

Single-sided or two-sided redundancy is possible

Single-sided or two-sided redundancy is possible

Bit memories/timers can be used

No

No

No

No