Only one address is used to identify the module on bus A and bus B.
CI590-CS31-HA address must be set based on the “number of CS31 mod-
ules“ calculated by Automation Builder.
The address (00d to 99d) is set with two rotary switches on the front panel of the module.
CS31 bus module reads the position of the address switches only during initiali-
zation after power on, i.e. changes of the settings during operation remain inef-
fective.
1.7.2.1.7 CI590-CS31-HA Limitations
The following peculiarities concerning the CS31 bus in the AC500 must be observed when
addressing S500 I/O devices at the CS31 bus:
● One CS31 software module can occupy a maximum of 15 bytes of inputs and 15 bytes of
outputs in the digital area. This corresponds to 15 x 8 = 120 digital inputs and 120 outputs.
● One CS31 software module can allocate a maximum of eight words of inputs and eight
words of outputs in the analog area.
● A maximum of 31 of these CS31 software modules are allowed for connection to the CS31
bus.
● If a device contains more than 15 bytes or eight words of inputs or outputs, it occupies two
or more of the 31 CS31 software modules.
● The CI590-CS31 can internally manage two CS31 software modules in the digital area and
five CS31 software modules in the analog area. This corresponds to a maximum of:
– 240 digital inputs (2 x 15 bytes) and
– 240 digital outputs (2 x 15 bytes) and
– 40 analog inputs (5 x 8 words) and
– 40 analog outputs (5 x 8 words).
● Address setting is done at the CI590-CS31 using two rotary switches at the module's front
plate.
● To enable the fast counter of the CI590-CS31 the hardware address (HW_ADR) has to be
set to the module address + 70. With activated fast counter, the module addresses 0...28
(hardware address setting 70...98) are allowed.
Then, the CI590-CS31 registers contain two CS31 software modules using the module
address (hardware address 70), once in the digital area and once in the analog area.
● CS31 software module 1 in digital area:
-> registers using the module address.
CS31 software module 2 in digital area:
-> registers using module address+7 and bit "Channel ³ 7" set.
CS31 software module 1 in analog area:
-> registers using the module address.
CS31 software module 2 in analog area:
-> registers using module address and bit "Channel ³ 7" set.
CS31 software module 3 in analog area:
-> registers using the module address+1.
CS31 software module 4 in analog area:
-> registers using module address+1 and bit "Channel ³ 7" set.
Communication Interface Modules (S500) > CS31
2019/04/17 3ADR010121, 13, en_US 767
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